December 22nd, 2015 To Kill A Mockingbird by: Harper Lee

Name: ___________________________________

Date: _____________________

Directions: Answer using complete sentences! Use the information you have been given to answer questions about: The Structure of Bones. Challenge yourself and try the highest level you can!

Subject: The Skeletal System: The Structure of Bones.

Level#1: The centers of flat bones and the ends of long bones are not as hard as compact bones. These softer parts of bones 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 not as hard as compact bone?




2. What are the softer parts of bone called?




3. What does spongy bone look like?






Level#2: The centers of flat bones and the ends of long bones are not as hard as compact bones. These softer parts of bones 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 is not as hard as compact bone?




2. What are softer parts of bone called and what do they look like?




3. List three facts about spongy bone that are found in the text above.






Level#3: The centers of flat bones and the ends of long bones are not as hard as compact bones. These softer parts of bones 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. How do the centers of flat bones and the ends of long bones differ from compact bone?




2. What are these softer parts of bone called and what do they look like?




3. List three facts about spongy bone that would be important to know if you were studying it.






4. how is red marrow different from yellow marrow?






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