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What are capillaries?
Quick Answer
Capillaries are the body’s tiniest blood vessels, where oxygen, nutrients, and waste are exchanged with tissues.
The Full Story
Capillaries connect the arterial and venous sides of the circulatory system. Their walls are only one cell thick, which makes exchange with surrounding tissues very efficient. Oxygen and nutrients leave the blood here, while carbon dioxide and other wastes enter it. Although tiny, capillaries are extremely numerous and are essential for keeping organs and tissues alive.
Key Facts
1.Smallest blood vessels in the body
2.Walls are one cell thick
3.Main site of exchange with tissues
YouTube Angle
Suggested video title for this topic:
"The microscopic vessels that feed every cell in your body."
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