. Read the Statements given below and identify X and Y
x is a blood vessel having thick,
clastic walls.
Y is a blood wessel having thin walls.
1) X- veins, y - Capillaries:
2) x- Capillaries, y - Arteries
3) x- Arteries, y - Veins
4) X- Capillaries, y - Arteries.
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Answer:
3) x-arteries y- veins
Explanation:
Arteries are thick walled blood vessels which carry blood from heart to all parts of body. They have thick walls because blood emerges from the heart under high pressure.
In comparison, veins are thin walled blood vessels which carry deoxygenated blood from all parts of the body back to the heart. They do not need thick walls because blood flowing through them is no longer under high pressure. Instead, they have valves which prevent the back flow of blood.
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