The exchange of nutrients and respiratory gases occurs between these small, one-cell wide vessels, and the blood and tissue fluid around the cells.
a. arteries
b. veins
c. capillaries
d. arterioles

( C ) Capillaries

Explanation:

Capillary is the smallest blood vessels of the body , of 5 to 10 micrometres diameter.

These blood vessels forms a large network in the body.

The function of the capillaries is to exchange nutrients , oxygen , waste in between the blood and the tissues.

The blood flow in the body is as follows-

The blood flows from the heart via arteries , which further branches into arteriols , which further branches into capillaries , where the nutrients get exchanged .

After the exchange process is done , then the capillaries merge to become wide, venules , these venules further widen to become veins , and the blood is returned back to the heart by the vein , venae cavae.

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explanation:

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