Your capillaries are AMAZINGLY thing,
when you start to bleed or graze your knee, even if you get a paper cut then that means one of your cappillaries has burst.
The thickness of the capillaries is very thin, they are about one cell thick.
Capillaries have thin walls to optimise the level of diffusion of oxygen and other nutrients in the blood stream to the surrounding cells.
Unlike veins and arteries, capillaries are very small and very thin. While veins and the like have over 5 layers, capillaries only have two.
The circulatory system because the artery and the heart is their.
Oxygen passes into the capillaries that surround the alveoli. The thin walls of the capillaries make this diffusion easier.
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
Capillaries.
Tunica Externa
The thin walled blood vessels are called capillaries.
tae
so they can allow for gas exchange
very thin, often a cell thick