Question

One cell-thick vessels are called

I. Arteries

II. Veins

III. Capillaries

IV. Pulmonary artery​

Answer 1

Answer:

Capillaries are called short and narrow blood vessels located inside the tissues. The exchange of substances between blood and tissues is carried in by capillaries.

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Explanation:

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Answer 2

Answer:

Capillaries

One cell thick vessels are called as Capillaries. Explanation: Capillaries are the smallest vessels involved in the transportation od materials. ... Their walls are so light that they are made up of only one 

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