6. Which blood cells are important for immunity?
7. What is the function of valves in veins?
8. What will happen if the blood platelet count drops in a human being?
9. State two functions of blood in our body.
10. Why do arteries have thick elastic walls?
11. What is a pulse?
12. Which blood group is a universal donor? NO!
13. What is the meaning of Rh-positive blood group
14. Person with blood group A can receive blood from which blood group?
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7. White Blood Cells (WBCs) are important for immunity.
8. Valves prevent the backflow of blood in veins.
9. Blood carries Oxygen to different parts of the body.
Also it transports the waste from cells for excretion.
10. Blood emerges under pressure from heart. Thus, to withstand that pressure, arteries are provided with thick elastic walls.
11. Pulse is the rate at which heart beats per minute.
12. O
13. Rh-positive blood group means that Rh antigens are present on the surface of RBCs of the person
14. Either A or AB
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