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7th Grade Chapter 14
Bones, Muscles, and Skin
| Question | Answer |
|---|---|
| nucleus | directs the activities of a cell |
| the pigment melanin | helps protect the skin from sunburn |
| cardiac muscle | is found only in the heart |
| a hinge joint | can move backward or forward |
| joint | a place in the body where two bones come together |
| skeletal system | makes blood cells |
| marrow | the soft connective tissue that fills the spaces in bones |
| compact bone | located beneath the outer membrane of the bone |
| ligament | a strong connective tissue that holds movable joints together |
| nervous tissue | carries messages back and forth between the brain and other parts of the body |
| pores | openings in the skin through which perspiration exits the body |
| skeletal muscles work together while | one muscle in the pair contracts and the other returns to its original length |
| newborn baby's skeleton | is made up of cartilage |
| homeostasis | the process by which an organism's internal environment is kept stable in spite of changes in the environment |
| skeletal muscles work must work in pairs because | muscle cells can only contract |
| muscle tissue | can contract or shorten |
| washing your skin | helps prevent acne |
| the skin regulates body temperature | by enabling excess heat to escape from the body |
| eating dairy products helps to maintain healthy bones because | they are good sources of calcium |
| nerves and blood vessels in the skin are located in | the dermis |
| exercise is important for muscles because it | helps maintain strength and flexibility |
| the living cells in the epidermis are located | beneath the dead cells |
| functions of the skeleton include | providing shape and support for the body, protecting internal organs, and producing blood cells |
| the skin protects the body from disease by | keeping disease-causing microorganisms from entering the body |
| skeletal muscle | tires quickly during exercise |
| the bones that form the backbone are called | vertebrae |
| epithelial tissue | lines your digestive track and allows you to digest food |
| the best way to prevent osteoporosis | exercise regularly and include calcium in your diet |
| skin produces | Vitamin D |
| exercise helps maintain healthy bones | by making bones grow stronger and denser |
Created by:
Mrs. Gordon
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