define capillaries in biology
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Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them.
They help to connect your arteries and veins in addition to facilitating the exchange of certain elements between your blood and tissues.
Capillaries connect the arterial system — which includes the blood vessels that carry blood away from your heart — to your venous system. Your venous system includes the blood vessels that carry blood back to your heart.
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Explanation:
- Capillaries are the blood vessels that carry blood to each and every cell of the body.
- Capillaries are shorter versions of arterioles.
- They are only one cell thick, which allows the blood to diffuse into other cells very easily.
- These join together to form veins.
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