March 3rd, 2017 Persepolis by: Marjane Satrapi

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Directions: ANSWER USING COMPLETE SENTENCES! Use the information you have been given to answer questions about: The Skeletal System: The Structure of Bones.

*To improve your MATH SKILLS spend at least 20 minutes practicing them using IXL.COM. (REMEMBER TO ENTER YOUR USER NAME AND PASSWORD WHEN LOGGING ON! THAT WILL BE PROOF THAT YOU DID IT!

Level#1

A bone is covered with a strong membrane. This membrane has many blood vessels that pass through it. Blood supplies living bone cells with nutrients and oxygen.

1. Nutrients and oxygen are necessary for living bone cells to survive, where do they get it from?





2. What does the membrane of a bone have that carries blood to it, so it can get the oxygen and nutrients it needs?





3. What is a bone covered with?








Level#2

A bone is covered with a strong membrane. This membrane has many blood vessels that pass through it. Blood supplies living bone cells with nutrients and oxygen. Under the membrane is compact bone. Compact bone is made up of living bone cells. It is also made up of the mineral calcium. Calcium in compact bone makes it hard and gives it strength. A network of tubes also runs through compact bone. These tubes contain blood vessels and nerves.

1. what supplies living bone cells with nutrients and oxygen?







2. What is found under the strong membrane of a bone?






3. Describe the composition of compact bone.






4. Describe the role of calcium in compact bone.








Level#3

A bone is covered with a strong membrane. This membrane has many blood vessels that pass through it. Blood supplies living bone cells with nutrients and oxygen. Under the membrane is compact bone. Compact bone is made up of living bone cells. It is also made up of the mineral calcium. Calcium in compact bone makes it hard and gives it strength. A network of tubes also runs through compact bone. These tubes contain blood vessels and nerves. The centers of flat bones and the ends of long bones are not as hard as compact bones. These softer parts of bone are called spongy bone. They even look like sponges because they are filled with many spaces. The spaces are filled with connective tissue  and blood vessels. Although they are softer than compact bones, spongy bones are quite strong. The spaces in them form a support structure that is lightweight. Spongy bones provide support to areas in bones where there is great pressure and stress.

1. Describe the composition of compact bones and the role that calcium plays in compact bone.







2. Explain what spongy bone looks like and what the spaces in spongy bone are filled with.







3. Explain what the spaces in spongy bone form and what spongy bone provides for bones as a result of its unique structure.








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