Blood capillaries are the thinnest, their walls only a single layer thick in order to reduce the diffusion distance for substances between the blood and tissues.
capillaries
Capillary
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.
veins
The arteries, but to be exact, the aorta.
Capillaries are the smallest of all blood vessels.
red blood cells
there is not a certain kind of vessel; all the vessels stretch.
The only blood vessels that contain valves are veins.
Platelets form to help control the blood loss.
Dilation of a blood vessel is the term for physiologic widening of the vessel. Abnormal widening of the blood vessel through a weakening of the wall is known as aneurysm.Dilation of a blood vessel means widening of the vessel.
The thinest layer of the earth