March 8th, 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

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.

1. What are the spaces in spongy bone filled with?






2. What parts of flat bones and long bones are not as hard as compact bones?






3. What are the softer parts of bones called and how did they get their name?








Level#2

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. What do spongy bones provide to for bones they are found in?






2. What do the spaces found in spongy bone form?







3. What are the spaces in spongy bone filled with?








Level#3

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. The centers of your bones are filled with marrow. Marrow makes blood cells. Marrow is red or yellow in color. Red marrow actively makes red blood cells. Yellow marrow is not active. It is found in the center of long bones. Yellow marrow is made mostly of fat cells.

1. What are the centers of flat bones filled with and what is produced in them that the body uses constantly?







2. Explain one major difference between red and yellow marrow, and where specifically yellow marrow is found.







3. We learned that yellow marrow is made mostly of fat cells. Explain what Mr. Zeiger believes yellow marrow's purpose was when human beings were nomadic?








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