Biology
Chemistry
AP Chemistry
English
AP English Literature
Biology
Nov 22, 2025
141
24 pages
ej @ejzerr
The skeletal systemis a crucial component of human anatomy, comprising 206 bones that serve multiple vital functions.... Show more
The skeletal system function extends beyond mere structural support. Bones play a crucial role in various bodily processes
Support The rigid nature of bones provides a structural frame for the body.
Protection Bones like the cranium and ribcage shield vital organs from damage.
Movement Bones act as levers for muscle attachment, enabling coordinated motion.
Blood Cell Formation Red marrow within bones produces blood cells through hematopoiesis.
Mineral Storage Bones store calcium and phosphate, essential for various bodily functions.
Highlight The 5 major functions of the skeletal system are support, protection, movement, blood cell formation, and mineral storage.
Vocabulary Hematopoiesis - The process of blood cell formation within bone marrow.
The human body contains various types of bones, each with unique characteristics suited to their functions
Long Bones Found in limbs, these bones are longer than they are wide and absorb stress from body weight.
Short Bones Roughly cube-shaped, these bones are found in wrists and ankles.
Flat Bones Thin and flat, these bones are present in the cranium, ribs, and sternum.
Irregular Bones With complex shapes, these bones include vertebrae and facial bones.
Example Long bones are found in arms, forearms, hands, thighs, legs, and feet.
Definition Articular cartilage is a thin layer of hyaline cartilage covering the joint surfaces of bones.
Long bones have distinct anatomical features
Diaphysis The long central shaft of the bone.
Epiphyses The extreme ends of the bone that form joints with other bones.
Periosteum A dense connective tissue covering the bone's outer surface, except where articular cartilage is present.
Compact Bone Forms the walls of the diaphysis.
Spongy Bone A lattice network occupying the epiphysis.
Medullary Cavity A central chamber in the diaphysis filled with yellow marrow.
Endosteum A thin membrane lining the interior surface of the medullary cavity and extending into spongy bone spaces.
Vocabulary Periosteum - A sheet of dense connective tissue that envelops the bone, containing blood vessels and firmly attached to the bone's outer surface.
Bones are complex structures composed of various tissues and materials
Bone Tissue The primary component of bones.
Cartilage Provides flexibility and cushioning at joints.
Dense Connective Tissue Forms the periosteum.
Blood-Forming Tissue Present as red marrow in bone spaces.
Blood Vessels and Nerves Supply nutrients and innervation to bone tissue.
Bone tissue itself contains both inorganic and organic materials
Highlight The combination of inorganic minerals and organic collagen gives bones their unique properties of strength and flexibility.
Three types of cells are crucial for bone health and maintenance
Osteoblasts Arise early in life from embryonic cells and are found on bone tissue surfaces in adults. They actively produce bone matrix (mineral salts and collagen).
Osteocytes Mature bone cells that maintain the bone matrix.
Osteoclasts Large, multinucleated cells that break down bone tissue, playing a vital role in bone remodeling and repair.
Vocabulary Osteoblasts - Bone-forming cells that produce the organic and inorganic components of the bone matrix.
The skeletal system is a complex network of 206 bones that performs several critical functions in the human body
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
16
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
science false cards of the Blood vessels and Blood
Combined ScienceA&P flashcards
BiologyLearn about the composition and characteristics of the skull, facial bones, vertebral column, and ribs in the human body.
BiologyHydrological System easy to read great and nice
BiologyLearn about the structure and function of cells, the different types of cells, and the discovery of the cell theory.
BiologyThe differences between prokaryotic and eukaryotic cells are in the notes. so are the meaning of the words. The colors I used don’t mean anything, It’s a way for me to better organize my notes and they’re not in boring gray so I’ll want to read it more
BiologyApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
ej
@ejzerr
The skeletal systemis a crucial component of human anatomy, comprising 206 bones that serve multiple vital functions. This system not only provides structural support and protection for internal organs but also plays a key role in movement, blood cell... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The skeletal system function extends beyond mere structural support. Bones play a crucial role in various bodily processes:
Support: The rigid nature of bones provides a structural frame for the body.
Protection: Bones like the cranium and ribcage shield vital organs from damage.
Movement: Bones act as levers for muscle attachment, enabling coordinated motion.
Blood Cell Formation: Red marrow within bones produces blood cells through hematopoiesis.
Mineral Storage: Bones store calcium and phosphate, essential for various bodily functions.
Highlight: The 5 major functions of the skeletal system are support, protection, movement, blood cell formation, and mineral storage.
Vocabulary: Hematopoiesis - The process of blood cell formation within bone marrow.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The human body contains various types of bones, each with unique characteristics suited to their functions:
Long Bones: Found in limbs, these bones are longer than they are wide and absorb stress from body weight.
Short Bones: Roughly cube-shaped, these bones are found in wrists and ankles.
Flat Bones: Thin and flat, these bones are present in the cranium, ribs, and sternum.
Irregular Bones: With complex shapes, these bones include vertebrae and facial bones.
Example: Long bones are found in arms, forearms, hands, thighs, legs, and feet.
Definition: Articular cartilage is a thin layer of hyaline cartilage covering the joint surfaces of bones.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Long bones have distinct anatomical features:
Diaphysis: The long central shaft of the bone.
Epiphyses: The extreme ends of the bone that form joints with other bones.
Periosteum: A dense connective tissue covering the bone's outer surface, except where articular cartilage is present.
Compact Bone: Forms the walls of the diaphysis.
Spongy Bone: A lattice network occupying the epiphysis.
Medullary Cavity: A central chamber in the diaphysis filled with yellow marrow.
Endosteum: A thin membrane lining the interior surface of the medullary cavity and extending into spongy bone spaces.
Vocabulary: Periosteum - A sheet of dense connective tissue that envelops the bone, containing blood vessels and firmly attached to the bone's outer surface.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Bones are complex structures composed of various tissues and materials:
Bone Tissue: The primary component of bones.
Cartilage: Provides flexibility and cushioning at joints.
Dense Connective Tissue: Forms the periosteum.
Blood-Forming Tissue: Present as red marrow in bone spaces.
Blood Vessels and Nerves: Supply nutrients and innervation to bone tissue.
Bone tissue itself contains both inorganic and organic materials:
Highlight: The combination of inorganic minerals and organic collagen gives bones their unique properties of strength and flexibility.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Three types of cells are crucial for bone health and maintenance:
Osteoblasts: Arise early in life from embryonic cells and are found on bone tissue surfaces in adults. They actively produce bone matrix (mineral salts and collagen).
Osteocytes: Mature bone cells that maintain the bone matrix.
Osteoclasts: Large, multinucleated cells that break down bone tissue, playing a vital role in bone remodeling and repair.
Vocabulary: Osteoblasts - Bone-forming cells that produce the organic and inorganic components of the bone matrix.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The skeletal system is a complex network of 206 bones that performs several critical functions in the human body:
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
You can download the app in the Google Play Store and in the Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
16
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
science false cards of the Blood vessels and Blood
Combined ScienceA&P flashcards
BiologyLearn about the composition and characteristics of the skull, facial bones, vertebral column, and ribs in the human body.
BiologyHydrological System easy to read great and nice
BiologyLearn about the structure and function of cells, the different types of cells, and the discovery of the cell theory.
BiologyThe differences between prokaryotic and eukaryotic cells are in the notes. so are the meaning of the words. The colors I used don’t mean anything, It’s a way for me to better organize my notes and they’re not in boring gray so I’ll want to read it more
BiologyApp Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
