March 9th, 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 is the name of the softer parts of bone?






2. What does spongy bone look like?







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








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. How are the centers of flat bones and the ends of long bones different from compact bones?






2. Describe the insides of spongy bones.







3. List three specific ways that make spongy bone unique








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. Explain what spongy bone looks like and has inside of it.






2. Explain the unique structure of spongy bone to a person who know nothing about it.







3. Explain where bone marrow is found, what it can look like, and the differences between red and yellow marrow.








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