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Why are capillaries most suitable for exchange of materials in tissues?

Answer and explanation

Correct answer: Their walls are very thin and they form a network

Capillaries are microscopic vessels that connect the smallest arteries with the smallest veins. Their walls are usually only one cell thick, so oxygen, carbon dioxide, nutrients and wastes can diffuse across a short distance. Their extensive network lies close to body cells and provides a large exchange area. Thus option A is correct; the other choices describe no function of capillaries.

Related tags

CapillariesExchangeTissuesBlood-VesselsLife ProcessesWorld Of LivingScienceClass 10 Mcq

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