BB 08/25/23



Aug 25, 2023




  • EDUCATE:  Tip for the week – Household Directory
    • If you want to contact other parents in your child’s class to arrange playdates or invite to birthday party, etc, you can find that information on EDUCATE.  Login>School>Directory.  Filter by grade from drop down menu in top right corner.
    • ***The only contacts that will be listed are those from parents who have granted permission in EDUCATE.  If you would like for other parents to be able to contact you, please follow the instructions here to do so.
  •  SCROOBY:  This is your quarter to bring in extra supplies!  Please have them in by September 5th.


If a  Lower School student needs to be picked up early for an appointment:
  • Email the office ( and the teacher 24 hours in advance.
  • When you arrive, please ring the doorbell.  The student will then be walked out to you.  
  • Let the teacher and office know when the student will return.
If an Upper School student needs to be  picked up early for an appointment:
  • Email the homeroom teacher 24 hours in advance.
  • When you arrive, please ring the doorbell.


  • Yellow car tags need to be displayed in the passenger side window.  Staff cannot see tags that are flat on the dashboard.  
  • Need more yellow car tags?  Email the school:


  • Yellow car tags need to be displayed in the driver’s side window.  Staff cannot see tags that are flat on the dashboard.  (The sun reflects off the windshield, or the rain grays it out making it impossible to see.)


  • Entry fees for Bradford home games are as follows:
    • $5 / adult
    • $3 / senior citizen
    • Students free!



  • Tues, 8/29:
    • 2:30 – MS volleyball HOME
    • 3:30 – V volleyball HOME
    • 3:30 – V soccer HOME
  • Thurs, 8/31:  7:50 – Lower school Archer prayer group – all are welcome!  Grandparents too!
  • Fri, 9/1:  
    • 7:50 – Upper school Archer prayer group – all are welcome!  Grandparents too!
    • 3:30 –  V volleyball HOME


  • Mon, 9/4:  Labor Day – NO SCHOOL
  • Thurs, 9/14:  11th grade and parents – College Info Night (time TBD)
  • Wed, 9/27:  Half day – Teacher workday
  • Fri, 9/29:  to be confirmed – Lower school: Soccer tournament
  • Fri, 10/6:  End of quarter 1
    • 3rd grade:  Field trip to Science Museum
    • Report cards released on EDUCATE
  • Week of October 9th:  FALL BREAK
  • Week of October 9th: MS and Varsity Conference Tournaments
  • 2nd and 3rd QUARTERS:  Sweaters required with dress uniform
  • Fri, 10/27:  
    • K – 4th:  Greek Olympics
    • Plymouth HOUSE SOCIAL
  • Sat, 10/28:
    • Leiden HOUSE SOCIAL
  • Thurs, 11/2:  Lower school Pictures
  • Fri, 11/3:  
    • Upper school Pictures
    • Austerfield HOUSE SOCIAL
  • Sat, 11/4:
    • Scrooby HOUSE SOCIAL






Transitional Kindergarten (Mrs. Grubb and Mrs. Weber)

TK completed our first full week of school. The students are getting into their routines and systems of the classroom. This week we colored self-portraits and graphed the number of boys and girls in our classes. We also used pattern blocks and bears for counting and introduced linking cubes. Students now know how to skywrite numbers 1-8. Students continued working on shaking hands and we introduced several new songs this week. We also began learning our first nursery rhyme, I’m A Little Teapot. TK students went on a treasure hunt this week and found our treasure, the Bible! We talked about the Bible and how it is God’s Word. Next week we will begin our study of Creation and continue memorizing Ecclesiastes 9:10. 


Lower School P.E. (Mrs. Bennington)

K – 4th
  • This week we began class by reviewing all of the expectations and whistle blows  for P.E. Students also completed several relay races and hand-eye coordination relays. We spent a lot of time talking about perseverance and effort. I want students to see the value of these character traits in P.E. and in all areas of their life.  

Lower School Music (Mrs. Bennington)

  • Students did a great job in music this week. We worked on “Deep and Wide”, Non Nobis”, and the first two verses of “To God Be The Glory”.  We also listened to two movements from “The Four Seasons” by our composer of the quarter, Antonio Vivaldi. We spent a lot of time talking about self control and effort. I want students to see the value of these character traits in music and in all areas of their life.  


Lower School Art (Mrs. Palmer)

  • This week students learned about our artist of the quarter, Giotto di Bondone.  We talked about where Giotto was in history as well as some of his works of art and what made him memorable.  Ask your student to share a Giotto fact with you!
  • This week students learned about our artist of the quarter, Giotto di Bondone.  We talked about where Giotto was in history as well as some of his works of art and what made him memorable.  Ask your student to share a Giotto fact with you!

Kindergarten (Mrs. Rivera and Miss Burdeshaw)

This Week:

Our kindergarten scholars have had another full and enriching week of learning here at Bradford. In math, we learned how to fill in a dot cube graph, how to write the numbers 0, 6, 8, and 9, the difference between fewer and most, and how to identify our right from our left. We also took our first math test and learned about test taking procedures. In phonics, we reviewed our first six phonogram sounds and we continued to practice drawing circles as a foundation for beginning cursive writing. In history and art, we finished our section on the creation story from Genesis, by completing days four, five, and six of our creation magnets. 

Memory Work:

1 Corinthians 13: 4-8a 

1st Grade (Mrs. Morgan & Mrs. Smith)

This Week:  

Our 1st Grade students are falling back into the routine of school, remembering how to navigate the classroom, homework, and all the aspects that make Bradford special. We are reviewing math, including adding doubles, telling time by the hour, and remembering all the days of the week. In phonics, we are reviewing sounds and sounding out words in order to decode them. In penmanship, we are reviewing our lowercase letters and adding to our knowledge base, the upper case letters.  In history, we are taking a look at symbols of America, including the US flag, the bald eagle, the Statue of Liberty, and the Liberty Bell. In grammar we are discovering nouns and distinguishing between common and proper nouns. Finally, in science, we have been observing and learning about birds, specifically the bird of the month, the Northern Cardinal.  

Memory Work: 

1 Corinthians 13:4-8a

2nd Grade (Mrs. Hedgecock & Mrs. Eng)

This Week:

The adventure continues in 2nd grade.  After enjoying the story of God’s creation, this week we looked at the fall in the garden and discussed the consequences of disobedience to God.  This is a deep topic, but an important topic for the students to start to ponder.  We had our first Latin quiz and the students did well and are now learning to ask each other what their name is and provide the answer. We also had our first math assessments to see how well the students can add 0 and 1 as well as the doubles.  We have spent a lot of time reviewing the calendar and telling time to the hour and half hour.   In grammar we started using dictionaries to look up our weekly vocabulary words to identify if words are synonyms or antonyms.  The journey into sentence classification began with learning the Question and Answer Flows to label short, two-word sentences.  The highlight was when we combined our science studies of the five senses with our current book “Prairie School” as the students took turns performing the chores that Noah was responsible for back in 1880.  The year is off to a great start and we are delighted to be a part of your child’s 2nd Grade adventure.  

Memory Work: Review Proverbs 1:7 

Upcoming:  Hebrews 11: 4-5


3rd Grade (Mrs. McDorman and Mrs. Meredith)

This Week
  • Before we begin Black Ships Before Troy next week, the adaptation of Homer’s The Iliad, students discussed the idea of virtue or areté in Greek. Aristotle defined virtue as, “the excellence at being human.”  While the Greeks did not have the Bible or a relationship with the one, true God, they identified virtues, or moral habits, that they believed enabled man to achieve his telos or end purpose in life. Students learned that the Greeks valued virtues such as wisdom, courage and fortitude.  Beginning next week, we are going to take a look at the little ‘g’ gods from Greek myths that shaped and defined ancient Greece and compare them to the one, true God. It will not take your child long to see the vengeful, petty, self-serving nature of these gods, who had more vices (and more power) than most of the human characters from these myths. As we compare them to a generous, merciful God, who loves us with a self-sacrificial love, your child will quickly see that the gods of ancient Greece do not compare. Students enjoyed brainstorming virtues and vices to add to our list as we identify these throughout the book. Third grade has been full of big words, and we have set out to discover their meanings. In math, students have been estimating time, identifying the relationship between seconds, minutes, and hours, adding 3 or more single-digit numbers, and solving for the missing addend. We have studied the Mycenaean Culture, memorized a new set of Latin chants and vocabulary, and presented to the class a paragraph on the Stinking Giant. I Corinthians 10:31 reminds us that we are to do all things to the glory of God! Your students actively strive to live out that meaning in class, and hopefully carry that into your homes!
Memory Work:
  • Proverbs 25:28
  • Biome Project 


4th Grade (Mrs. Burtram and Miss Abrahamsen) 

This Week
  •  We have had an amazing active learning week!  We enjoyed our Barbarian Invasion Poster Presentations and learned many fascinating things about many different groups.  We built a model of a Viking ship using items from nature during nature study.  We even measured how long the viking ship would have been and how the shape of the boat allowed them to creep ashore in fog covered waters.  The students learned about seeds and the parts of seeds.  They began their bean sprouting project and will document their growth in their science journal over the next couple of weeks.  We studied adverbs and sentence patterns in English, new vocabulary and chant review in Latin.  Math was filled with new vocabulary this week (commutative property, inverse operations, sum, difference, and fact families) and we applied these terms to many addition and subtraction problems.
Memory Work:
  • Philippians 4: 4-7
  • Monk Day




Mrs. Bennington

5th-6th Band
  • We started our week by reviewing  how to count several rhythm lines before we tried to play them on our mouthpieces. We then reviewed how to open our cases, put together our mouthpieces, make the correct embouchure needed for each instrument, where to put our mouthpiece on our lips, how to sit when we play, how to breathe, how to articulate the sound, and how to play our mouthpiece. Last, we learned how to put our instruments together, how to hold our instruments correctly, and how to position our hands and fingers to play our first note! Fun was had by all!
7th-9th Band 
  •  Students did a great job playing this week! We went back to the beginning of the book and continued with our  review of all of the concepts that we learned last year so that we can start working on more mature sounds this year. This also provided a great opportunity for the  students that switched instruments to get caught up with the rest of the class. 

Mr. Webster

5th-8th Boys’ PE
  • This week we continued playing ultimate frisbee. The boys also ran a mile and did strength training on Monday. 

Miss Stevenson

5th-8th Girls’ PE
  • Middle school girls finished up their base fitness assessments on Monday and played soccer on Wednesday.

5th Grade (Mrs. Owens) 

This Week
  • The students have already been connecting the dots with our history cards.  This week we learned about Christopher Columbus and how he got his start at Prince Henry the Navigator’s observatory.  In math we are working on concepts such as measuring line segments, finding the perimeter of shapes, and finding fractional parts.  We will continue to build upon these concepts as we move later in the year.  Science has been enjoyed by all.  This week we dove into learning about the skeletal system and the students took home information about their first major project of the year, the body project.  We have also been mastering classifying sentences in Grammar and writing key word outlines in writing.  In The Hobbit, Bilbo is already wondering if he really should have gone on this adventure with Gandalf and the Dwarves.  The adventure is proving to be a little more dangerous and challenging than expected. 
Memory Work:
  • Romans 12:3-5 (this week)
  • Romans 12:6-8 (next week)
  • Body Project: due on Wednesday, September 27th (more information found on Google Classroom and in the student’s black folders)

Mrs. Palmer

5th Art
  • This week we began working on our first project of the quarter.  Students will be creating Giotto-inspired stained glass windows.  Students will use ink and watercolor to create these beautiful windows. 

Mrs. Kromhout

5th Latin
  • 5th graders took their first test and then began our new chapter covering the third declension endings, the Dative case, indirect objects, and a new set of vocabulary! They are doing great! 


6th Grade (Miss Stevenson)

6th Reading and Literature
  • We continued reading Sign of the Beaver this week.
6th Grammar and Writing
  • I introduced Google Docs to the students this week. The first draft of their Narrative Essay is due Wednesday, August 30.
6th Bible
  • This week we continued to work our way through the Gospel of Matthew.
6th History
  • In History this week we learned a little bit about Jacksonian Democracy.
6th Science
  • This week in Science we finished up taking notes on the Nature of Science. Next week we will jump into more detail on the scientific method.
6th Logic
  • In Logic this week we discussed the red herring fallacy. We will watch some of the presidential primary debates to see if any of the candidates used this fallacy. Next week we will take a look at Ad Hominem attacks.

Mr. Hunter

6th Latin
  • This week, we finished discussing the imperfect and future tenses of first conjugation verbs, and we began looking at the subject and object cases of first and second declension nouns. The students also took their second vocabulary and grammar quiz. 

Mrs. Frueh

6th Math
  • We spent this week thoroughly reviewing fractions of all kinds (proper fractions, improper fractions, and mixed numbers), as well as how to use these fractions to read an inch-ruler. The students also took their first cumulative test of the year.

Mrs. Palmer 

6th Art
  • Students started their first project of the quarter – charcoal still life shoe drawings.  We spent time going over the range of values in grayscale, blending, the proper use of charcoal and how to look for details.  I’m looking forward to seeing these drawings come together. 


Mrs. Crotts

7th Grammar and Writing
  • We completed rough drafts of the writer’s choice short story that they began two weeks ago. This story is a writing sample to measure where students are in the land of writing skills.   We also spent time discussing passive voice versus active voice as well as the value of repeated editing and having someone else contribute to editing a paper.  Peer editing and parent editing are welcome, but also need to be held at bay so that the student’s actual writing shines and not the editor’s voice/skills.
7th Omnibus
  • Students tackled quite a few tasks: an overview of Ancient Egypt, assessment of the 10 Commandments–recitation and writing from memory, and an overview of Homer and his Odyssey. We continued to have  great discussion of how God’s grace is shown in His gift of the 10 Commandments–not impossible legalism, but salvation through Jesus Christ who upheld the Commandments and forgives us and points us back to him when we fail.

Mr. Johnston

7th Logic
  • Our young scholars discussed the importance of relevance in an argument.  We looked at an advertisement from Rocketwash and discussed why the reasons presented were relevant to its premise.  Students have the assignment of bringing an example of a clever advertisement and we will discuss the kinds of fallacies the advertisement makes.  

Mrs. Frueh

7th Science
  • This week’s classes included a thorough review of the scientific method, including how to distinguish between an independent and dependent variable, as well as the difference between an experimental group and a control group. We put our knowledge to the test by analyzing the experiments carried out by Dr. Christiaan Eijkman in the Dutch East Indies. These experiments earned him the Nobel Prize for Medicine in 1929 for the discovery of the true cause of beriberi, a nerve disorder that affected many people in southeast Asia in the late 19th century. Ask your student if they can describe the results of Dr. Eijkman’s experiments and how it has influenced the food industry today.
7th Pre-Algebra
  • This week, we looked at the different ways to interpret problems about equal groups (multiplication & division patterns).  The students learned to use logic to determine when it is appropriate to record an answer with a remainder, when to use a fraction, and when to use a decimal. We also took our first cumulative test.

Mrs. Palmer 

7th Art
  • Students began working on their original comic strips.  We have talked about the amount of comic clips we need, all the parts of a successful comic strip and how to create a humorous comic strip.  I am looking forward to these creative comic strips!

Mr. Hunter

7th Latin
  • This week we finished discussing the perfect tense. The students now know the present, imperfect, future, and perfect tenses. We reviewed cases uses, particularly the ablative. The students also took their second vocabulary and grammar quiz.


Mrs. Kromhout

8th Omnibus
  • History: In history this week, we began with a discussion of the significance of Augustus changing Rome from a republic to an empire, learned about the line of emperors that followed him, went through a day in the life of a Roman, and then began learning about the spread of Christianity after the death and resurrection of Christ. 
  • Literature: We continue reading Eusebius, reading about the early days of Christianity after Christ’s resurrection against the backdrop of the Roman empire; we also discussed the formation of the canon of scripture.
  • Composition: Students reviewed the structure of an essay and wrote a tiny essay this week about a topic from one of their summer reading books or from history!

Mr. Hunter

8th Latin
  • This week we finished learning the third conjugation verbs, and we began reviewing the present, imperfect, future, and perfect tenses of first, second, and third conjugation verbs. The students also took their second vocabulary and grammar quiz. 

Mrs. Frueh

8th Science
  • This week, we continued to review the difference between physical change and chemical change.  We attempted to use a competition reaction to remove tarnish from silver by using aluminum foil to attract the sulfur from the tarnish. It worked moderately well, but most importantly, the students were able to observe chemical change in action!
8th Algebra I
  • Our lessons this week were all about properly applying the Order of Operations to numerical expressions. The students learned the importance of diligence and attention to detail as they carefully simplified expressions with many negative signs and nested symbols of inclusion. Much of algebra is learning to be careful and methodical in your work. We also took our first cumulative test this week.

Mrs. Palmer 

8th Art
  • This week students learned about color nuances..  We talked about tone, tint, shade and saturation in color.  Students began their first project of the quarter which is magazine scrap landscapes inspired by Vincent Van Gogh. 

Mr. Crotts

8th Logic
  • We are learning that terms are concepts expressed precisely in words. Definitions give meaning to terms. A genus of a term is a broad, general, or abstract category such as food or animal. A species of a term is specific, narrow, or concrete, such as meat or dairy, or dog or cat. This is akin to biology but quite different! These studies are helping us learn to better define and understand relationships between them.





Juniors: Mark your calendars for the College Info Night in September where we will review the timeline and information for preparing for college.

For juniors and parents: Thursday, September 14th, evening (time TBD): College Info Night

For any students interested in NC State: NC State hosts an open house each year offering the opportunity to meet with specific academic departments and over 100 sessions about various topics! This event requires pre-registration and fills up – register asap if you are interested! 

Seniors: Mr. Meredith did a second session with the seniors this Thursday about the skills of writing resumes and interviewing. The seniors should be working on their resumes individually in the meantime, and then he is willing to meet with them individually to hone the resumes! These will be of great value in college and scholarship applications as well as simply having experience for future job applications.

  • Upcoming for seniors:

Over the next few months, I will be meeting with seniors often to give them guidance and time to work on the various parts of the college application! Below are the dates and topics we will cover. Parents, if you have questions or would like to meet, also feel free to reach out!

    • Thursday, August 31st, 10am-11:45am: College Application Essay Writing Workshop
    • Thursday, September 14th, 10am-11:45am: Scholarship Application Workshop
    • Thursday, September 21st, 2:15-2:45pm: Financial Aid Information (FAFSA, CSS Profile, etc.) 

Mrs. Palmer 

9th Spanish 
  • We have jumped right into Spanish!  Students are learning many new vocabulary words and took their first quiz this week.  We have learned about gender/number agreement and started learning numbers. We also listened in the target language this week.  I’m looking forward to a great year with your students!

Coach Johnston

9th History
  • Students studied some of the major battles that determined the trajectory of conquest and exploration during the Age of Exploration. Students took a geography map quiz on Friday and will then return to Europe for the beginning of the Reformation.

Mrs. Frueh

9th Geometry
  • Our first geometry unit is in full swing. This week, we explored our first four postulates (or axioms) regarding lines, points, planes, and space. The students also learned to distinguish between the words equal and congruent. We added two new formulas to our Geometry Resource Books: The Midpoint Formula and The Distance Formula. 

Mr. Crotts

9th Logic
  • Propositions or statements in English can be translated into symbolic language. We are learning the symbols that represent words as and, but, for, still, however, or, both, it is false that, and not.

Mrs. Fairchild

9th Advanced Art
  • Our students completed their reference guide for staining and non-staining watercolor paints.  Additionally, they completed reading chapter 1 of Saving Leonardo and continued discussion on why a Christian worldview matters. Having a solid foundation and understanding of who humans are is important.  Francis Schaeffer says, “We cannot deal with people like human beings, we cannot deal with them on the high level of true humanity, unless we really know their origin-who he is,  God tells us that He created man in His image. So man is something wonderful.”

Mrs. Hicks

9th Biology
  • This week we discussed our summer reading, Darwin on Trial. We also introduced our first unit of Biology!

Mrs. Crotts

9th Literature
  • We prepared for the journey through Pilgrim’s Progress by reading articles of author John Bunyan’s background.  Students also began reading about Christian’s pilgrimage.

Dr. Byrd

9th-10th Bible Survey
  • This week we have been examining the doctrine of the Holy Spirit and His role in giving us the Bible. We have also begun to study the books of the Bible beginning in the Old Testament. This week we have looked at the key themes of Genesis – creation, fall, and redemption. We have also begun to examine Exodus. 
  • Verse Memory: Heb. 12:1


Dr. James

10th Chemistry
  • This week we continued our coverage of introductory topics of chemistry.
  • Next week, the students will take their first test of Q1 on Monday.  Then we will begin a study of measurements in chemistry.

Mrs. Palmer 

10th Spanish
  • This week we spent reviewing past vocabulary, grammar concepts and verb conjugations.  Students took their first vocabulary quiz this week.  Your student will have a weekly vocabulary quiz – ask them to share with you some of the vocabulary words they are reviewing!

Mrs. Byrd

10th Algebra II
  • We reviewed some basic algebra topics – combining like terms, distributive property, solve percent equations, and properties of lines.  We’ll have our first test next Friday.

Mrs. Crotts

10th Literature
  • We had a brief review of the Rosetta Stone and its impact on language and translating old, forgotten languages.  The class began reading selections from Aesop’s Fables and faced their first quiz.

Miss Oldham

10th Rhetoric I
  • Students learned about their ethos. They also delivered their first speeches. Just a reminder: this is their lowest grade of the year because they can only grow from here! 

Coach Johnston

10th History
  • Students took a quiz on the geography of the Ancient Near East. We learned about Sumerian and Akkadian empires and how God called Abraham out of that land to a Promised Land. Students spent class and homework time considering the famous Hammurabi Law Code. We will conclude our study of the ANE next week and move quickly on to Egypt.
10th PE
  • Students continue to settle into daily warm-ups and workouts. This week our game play was focused on ultimate frisbee. Students demonstrated a growing understanding of individual and team movement as well as more patience while holding the disc to choose the right pass.


Mrs. Byrd

11th Precalculus
  • We spent the week reviewing how to identify a function and its domain and range.  We’ve also been practicing graphing the 5 basic parent functions.  Next week we will learn how to find and use inverse functions and how transformations affect parent functions.
11th Physics
  • Students spent the week learning about velocity and acceleration.  We can do basic calculations to find missing quantities, read velocity and acceleration off of a graph, and also demonstrate various properties in the lab.

Miss Oldham

11th Literature
  • We are reading City of God by St. Augustine and having good discussions on fate, free will, and suffering. 

Mr. Webster

11th History
  • This week we began our studies with the Late Roman Empire and the emergence of the medieval world. The students also took their first quiz on the reading concerning the nature of church history. 

Mr. Hunter

11th NT Greek
  • We began learning the subject and object cases of first and second declension nouns, and students took their first vocabulary and grammar quiz. 

Mrs. Fairchild

11th Elective: Portfolio
  • The wood burning projects are going well and progress is being made.

Coach Johnston

11th-12th Elective: Military History
  • Students briefly considered the general causes and motivations, the leaders and promises that Axis Powers Italy and Germany had for initiating World War 2. We spent a great deal of time talking through a brainstorming project to pick out research topics for papers this quarter, and each of the students has a clear sense of direction following that work. Next week we will particularly look at the beginning of the war, the “phony war,” our reading will consider the humanity and ethics of warfare and we will continue work on the research paper.

Mrs. Palmer

11th-12th Elective: Spanish 3 / ESL
  • Students worked on listening, writing, reading and speaking this week. We will be focusing on these pillars of language learning this year. We have been reviewing past grammar concepts, vocabulary and verb conjugations.  I’m looking forward to watching these students grow in their Spanish knowledge!

Dr. Smith

11th-12th Apologetics & Philosophy
  • We have been discussing how the gospel ought to be thought of as an organism, and how evangelism, apologetics and discipleship are not three separate activities that Christians participate in, but are three organically united activities that are unavoidable parts of the Christian life. Along with this, we have been and will continue to discuss the rest of this week and into next, how even the professing Christian needs to continue to be evangelized. 

Coach Johnston

12th History
  • Students read and discussed in detail the great battles of Spanish conquest and the factors that played such a significant role in leading to their success. We finished the week by taking a geography quiz and discussing motivations, justifications and the impact of a Christian, classical heritage on the nations that pursued New World conquest.

Miss Oldham

12th Literature
  • We are reading Paradise Lost and looking at the fall of Satan. 
12th Rhetoric II
  • Please continue to pray for our seniors! They are starting to pick topics for their theses. Next steps are talking with mentors and beginning their research. I am looking forward to seeing where these students take their ideas! 

Mrs. Byrd

12th Calculus
  • The week has mainly been spent finding limits using various algebraic techniques.  Next we will be learning how to recognize different types of discontinuities and determining their effect on limits.

Mrs. Hicks

12th Anatomy
  • This week we completed an Introduction to Anatomy and Physiology. We also completed a food lab where we reviewed the components of an animal cell.