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Answers
Answer:
1. Draw a well labelled diagram of a human heart.
Answer : the answer is in attachment...
2. Differentiate between Arteries and Veins
Answer :
Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body.
Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.
3. Write the functions of Components of blood .
Answer: Basic functions of blood include:
1) Transport of nutrients, waste products, blood gases (oxygen and carbon dioxide) or signaling molecules
2) Immune function
3) To maintain homeostasis of water, ions or pH
4) Distribution of heat throughout the body
5) Blood clotting
4. Give reasons : (a) Arteries are thick walled blood vessels.
Answer: Arteries are thick-walled, muscular vessels that almost always carry oxygenated blood away from the heart. The muscular walls allow the arteries to pulse and help push the blood farther along the circulatory pathway as the blood travels away from the heart. ... Veins carry blood heading toward the heart.
(b) Veins have values in them .
Answer: Veins carry the blood back to the heart. They're similar to arteries but not as strong or as thick. Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.)
5. what is Lymph ?
Answer: Lymph is the fluid that flows through the lymphatic system, a system composed of lymph vessels and intervening lymph nodes whose function, like the venous system, is to return fluid from the tissues to the central circulation.
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