4. Why is the pericardium important to the heart?
a. It beats and contracts.
b. It separates the right atrium from the left atrium.
c. It pumps blood.
d. It protects and serves as a cushion to the heart.
5. Which separates the right chambers of the heart to the left chambers?
a. aorta C. septum
b. pericardium d. valve
6. Why is the blood called "the river of life"?
a. It serves as a double pump.
b. It carries oxygen and food to the body.
c. It protects the body from diseases.
d. It contains minerals needed by the body.
7. Which is not a cellular part of the blood?
a. plasma c. red blood cells
b. platelets d. white blood cells
8. Which best describes the white blood cells?
a. They are the most special blood cells.
b. They are the producer of antibodies.
C. They give color to the blood.
d. They are the smallest parts of the blood.
9. Which of these carry blood away from the heart?
a. artery c. platelets
b. capillary d. veins
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