The capillaries are where the gas and nutrient exchanges occur. Because in a closed circulation system the blood can't go outside the vessels, it must go to the capillary beds where it is about 1 cell thick to have diffusion. Alveoli in lungs are covered by capillaries to allow gas exchange to happen. The capillaries are most abundant of all the blood vessels, because most part of your body requires oxygen, and capillaries are where it can be given to cells.
continuous capillaries continuous capillaries
Capillaries are the structures that connect arteries to veins.
Capillaries The smallest of the blood vessels: capillaries.
Arteries "feed" the capillaries while veins drain the capillaries.
plmonary veins begin as capillaries and end as capillaries
Sinusoidal Capillaries
The thin walled blood vessels are called capillaries.
continuous capillaries
capillaries.
The smallest blood vessels are the capillaries.
Capillaries connect small arteries to small veins. Capillaries are the site of gas exchange.
The branches from arteries are arterioles and then into capillaries.