how many types of blood vessels are there in a human body? name them. why does the heart needs valve?
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Explanation:
The Three Major Types of Blood Vessels: Arteries, Veins, and Capillaries. Blood vessels flow blood throughout the body. Arteries transport blood away from the heart..Veins return blood back toward the heart.
There are valves between the atrium and the ventricle on each side of your heart. There is also a valve controlling the flow of blood out of each of your ventricles. The valves are designed to keep blood flowing forward only. When each chamber contracts, a valve opens to allow blood to flow out.
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Answer:
Two types of blood vessels in human bodies are:
1)artries 2)veins.
Explanation:
The artries takes rich pure blood from heart to body.
The veins takes dirty blood from body to the heart.
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