Question

Where does the maximum exchange of material between blood and surrounding cells occur?

(i)

Heart

(ii)Veins

(iii) Arteries

(iv) Capillaries
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Answer 1

Answer:

capillaries

The site of exchange of materials between blood and the surrounding cells is capillaries. Blood capillaries are the smallest vessels and are only one cell thick. Hence, exchange of materials can easily occur by diffusion across the membranes of blood capillaries.

Answer 2

Answer:

[iv] capillaries

Explanation:

Blood capillaries are the smallest vessels and are only one cell thick. Hence, exchange of materials can easily occur by diffusion across the membranes of blood capillaries.