they are only one blood cell thick!
it has many more capillaries...if you were to wrap all of your capillaries around earth it would wrap around twice
Capillaries . The smallest of the blood vessels: capillaries.
Carbon dioxide passes into the blood at the capillaries of the systemic circulation. Then it is released at capillaries around the alveoli.
Capillaries
carbon dioxide
Yes, capillaries form a network around the alveoli. It is through the alveolar walls and into the capillaries that oxygen enters the blood stream. Carbon dioxide leaves the blood by the reverse route.
because they are too big to pass through the capillaries
capillaries are smaller than arteries and veins. they need to be small or it would look wierd with big buldges sticking out of your eye lids. :P
Capillaries are the smallest blood vessels that supply blood to the organs and muscles of the body, transferring oxygen to and carbon dioxide from them. Capillaries are found around the body, everywhere. High blood pressure causes the capillaries to burst. Bursting capillaries in the brain cause strokes, and bursting capillaries in the kidneys cause kidney failure.
The capillaries carry the blood around the alveoli.
capillaries
continuous capillaries continuous capillaries