Thin walled blood vessels are called :

(a) Aorta

(b) Capillaries

(c) Arteries

(d) Vena cava

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2 Answers

Correct answer is (b) Capillaries

Capillaries are small, thin blood vessels that connect the arteries and the veins. their thin walls allow oxygen, nutrients, carbon dioxide and waste products to pass to and from the tissue cells.

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Thin walled blood vessels are called as capillaries. They are only one cell thick.

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