Because they have a larger surface area than the other blood vessels.
Blood flows most slowly in capillaries, as their small diameter and large total cross-sectional area create high resistance to blood flow. This slow flow allows for efficient exchange of nutrients, gases, and waste products between the blood and surrounding tissue.
Capillaries do not have valves to regulate blood flow. Veins are the vessel of the circulatory system that have veins to regulate blood flow.
Blood does not move faster through the capillaries. Blood flow is slowest in the capillaries.
Capillaries
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venuoles
capillaries!
The capillaries flow from an artery to a vein.
From the capillaries, blood will flow into the veins and pump the un-oxygenated blood back to the heart.
Mosquitoes feed from capillaries because the blood flows more slowly in capillaries, making it easier for the mosquito to extract blood. If they were to feed from an artery, the high pressure of the blood flow would make it difficult for the mosquito to access the blood.
Veins are where the blood flow is the slowest. Blood flow velocity decreases from the aorta to the arteries to capillaries.
capillaries