Capillaries are one cell thin so that the red blood cells can easily exchange oxygen that they picked up in the lungs, with the bodies cells.
To allow easy exchange
So blood can easily pass from a vein to an artery or visa/versa. If the walls were thick than blood could not get through.
Unlike veins and arteries, capillaries are very small and very thin. While veins and the like have over 5 layers, capillaries only have two.
Deoxgenated Blood become oxygenated.
No, all gas exchange is done through capillaries. Both veins and arteries are too thick and contain muscle layers that prevent gas exchange. However, capillaries are small enough (blood cells can only pass through one at a time) that oxygen can pass to the tissues and carbon dioxide can pass to the RBCs.
Deoxgenated Blood become oxygenated.
Blood passes through the capillaries, which provide a passage way for the blood from the arteries to the veins. The tiny, thin walled capillaries also allow for the exchange of gases through the tissue. You can read more about capillaries at fi.edu
The thin walled blood vessels are called capillaries.
Capillaries are an extremely thin walled blood vessel - they are only one cell thick, which allows for the easy exchange of gases between the blood and the body tissues. Because they are so thin however, this also makes them very fragile.
The capillaries found in the alveoli, nephrons, and vili are thin-walled and narrow. This size and construction makes it easier for nutrients, oxygen, and wastes to diffuse from body tissues.
Arteries enter arterioles enter capillaries enter venules enter veins.
Capillaries - The endometrium (epithelial lining/wall) of the capillaries is only one cell thick optimizing diffusion/osmosis between it and the tissue cells of the body
Capillaries The smallest of the blood vessels: capillaries.
Vessels with extremely thin walls over wich molecules and atoms are transported are called "capillaries".