In the body, capillary tubes are in fact microscopic. However, the capillary effect can be viewed on a much larger scale. If one was to place a straw in a glass of water, one would see that the water level in the straw is higher than that of the glass of water, this is because the molecules of water are attracted to the wall of the straw, and each other.
Yes, the capillaries are the smallest kind of blood vessel, that facilitate the movement of substances (like oxygen and glucose) in and out of the blood through their very thin walls.
Capillary
Capillaries are the smallest of all blood vessels.
Either a arteriole on the artery side or a venule on the vein side of the bed.
Capillaries are the smallest kind of blood vessels in the circulatory system. They connect arterioles and venules and facilitate the exchange of gases, nutrients, and waste products between the blood and tissues.
capillaries
veins
The arteries, but to be exact, the aorta.
metarterioles when resistance is low
red blood cells
The only blood vessels that contain valves are veins.
there is not a certain kind of vessel; all the vessels stretch.