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Blood flows through the entire body in small tunnels called blood vessels.
Blood Makes Two Trips
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1. Heart 2. Aorta
3. Arteries 4. Veins
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Blood makes two trips, one short and one long. During the short trip, blood is pumped to the lungs where it gets rid of any carbon dioxide and fills up on oxygen.
During its longer trip, the blood travels through the body, to the tiniest little cell, before it returns to the heart, where it passes through, leaving nourishment to give the heart the strength to beat.
When the blood passes through the kidneys, it is cleansed of some waste and in the small intestine it absorbs nourishment. The blood then carries this nourishment out to other parts of the body.
Blood Vessels
The blood vessels sub-divide up into smaller and smaller tunnels, so that the blood can reach every little part of your body. The smallest blood vessels are called capillaries and are as thin as hairs.
As it travels, the blood distributes oxygen and nourishment, so that every cell gets what it needs. In return the cells deposit carbon dioxide and other waste the blood carries with it on its continued journey. The blood continues from the capillaries and on into the small, narrow blood vessels called veins. Now the blood is on its way back to the heart.
Finally, blood is returned to the heart, which then once again pumps your blood to your lungs ready for a new trip.
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