March 13th, 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: How bones grow and change

*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

Bones grow and change. Some cells help build bone tissue. Some cells break down bone tissue. When bone tissue is broken down, some of the minerals inside bones are released into the body for use. However, your body normally replaces those minerals with minerals from the foods you eat.

1. When bones are broken down, what happens to some of the minerals that were inside of the bones?






2. What do bones do, that allows your body to get bigger, as you get older?






3. What two jobs do cells do that allow your bones to grow and change?








Level#2

Bones grow and change. Some cells help build bone tissue. Some cells break down bone tissue. When bone tissue is broken down, some of the minerals inside bones are released into the body for use. However, your body normally replaces those minerals with minerals from the foods you eat. The building up and breaking down of your bones changes the size and shape of your bones as you age. At some point in your life, you may go through "an awkward stage" because of the way your bones grow. The first bones to grow quickly are usually your foot bones. Then, your arm and hand bones grow quickly.

1. What two things do cells have to do to allow your body to grow and change over time?





2. What does the body do with the minerals that are released when bone tissue is broken down?





3. How does the body usually replace the minerals that are lost when bone tissue is broken down?










Level#3

Bones grow and change. Some cells help build bone tissue. Some cells break down bone tissue. When bone tissue is broken down, some of the minerals inside bones are released into the body for use. However, your body normally replaces those minerals with minerals from the foods you eat. The building up and breaking down of your bones changes the size and shape of your bones as you age. At some point in your life, you may go through "an awkward stage" because of the way your bones grow. The first bones to grow quickly are usually your foot bones. Then, your arm and hand bones grow quickly. Because of this uneven growth, arms, hands, and feet may look too big for the rest of the body. This does not last long. After a while, the rest of the body catches up.

1. Describe the process that goes on that allows a person to change their size and shape as the grow older.





2. Explain the two jobs that cells do to allow bones to grow and change, and what happens when bone tissue is broken down.







3. Explain, what happens when bone tissue is broken down and how the body replaces minerals bone lose during this process.








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