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(B) The circulatory system consists of arteries,arterioles,capillaries,venules,and veins. Capillaries are the smallest blood vessels,with a diameter o

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Capillaries

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(B) The circulatory system consists of arteries,arterioles,capillaries,venules,and veins. Capillaries are the smallest blood vessels,with a diameter of approximately $8-10 \ \mu m$. Although individual capillaries are very small,they exist in such vast numbers that their combined total cross-sectional area is significantly greater than that of arteries or veins. This massive total surface area is crucial for the efficient exchange of gases,nutrients,and waste products between the blood and the surrounding tissues.

Column-$I$	Column-$II$
$a.$ Capillaries	$(i)$ Valves
$b.$ Veins	$(ii)$ Smooth muscles
$c.$ Aorta	$(iii)$ Narrowest blood vessels
$d.$ Tunica media	$(iv)$ Elastic artery

Which of the following has the largest total surface area in the circulatory system?

Similar Questions

Which of the following are located in the $tunica \text{ } media$ of human blood vessels?

Which of the following is devoid of valves?

Match column $I$ with column $II$.
Column-$I$ Column-$II$
$a.$ Capillaries $(i)$ Valves
$b.$ Veins $(ii)$ Smooth muscles
$c.$ Aorta $(iii)$ Narrowest blood vessels
$d.$ Tunica media $(iv)$ Elastic artery

Select the alternative which shows the correct matching.

$A$ capillary network is a network of what?

Which blood vessels carry oxygenated blood from the lungs to the heart?

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