The Circulatory System 9 Questions and Exercises K C
Key Concepts Rewrite the following sentences in your copybook and fill in the blanks. 1. The three main functions of the circulatory system are: (a) ____________________ (b) ____________________ (c) ____________________
2. The two major components of blood are: (a) ______________ (b) _______________ 3. List four functions of plasma.
4. Red blood cells are ____________ -shaped. 5. The function of red blood cells is to transport ____________ from the ____________ to the rest of the body.
6. White blood cells ____________ the body against ____________ . 7. Platelets help to clot blood and ___________________________________________ 8. The four chambers of the heart are: (a) ______________ (b) ______________ (c) _______________ (d) _______________
9. The largest blood vessel in the human body is the ___________________ . 10. The wall that separates the left and right side of the heart is called the _____________.
K U
Knowledge and Understanding 1. How is the structure of a red blood cell suited to its function?
2. Describe two ways in which white blood cells defend the body against disease. 3. Why do veins need to have valves? 4. Why is the wall of an artery thick and elastic? 5. What does the term double circulation mean? 6. Where is oxygen absorbed into the blood? 7. Where is carbon dioxide absorbed into the blood? 8. Where are nutrients absorbed into the blood? 9. Where are wastes removed from the blood? 10. What type of muscle is the heart composed of ? 11. How does heart muscle differ from the muscle in your arm? 12. Copy out the box below and write the chambers of the heart into the appropriate spaces: right atrium, right ventricle, left atrium, left ventricle.
