give the characteristics and function of arteries, capillaries,veins
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Capillaries carry blood away from the body and exchange nutrients, waste, and oxygen with tissues at the cellular level. Veins are blood vessels that bring blood back to the heart and drain blood from organs and limbs.
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ATERIES
- they carry blood away from heart
- they are thick-walled
- they withstand high blood pressure
- they carry oxygenated blood.
VEINS
- They carry blood from body to heart
- they are thin-walled
- They don't withstand high blood pressure
- They carry de-oxygenated blood
CAPILLARIES
- They are one cell thick.
- They carry blood to places where arteries can't reach.
- They are part of arteries.
- They carry oxygenated blood.
- They have pores which lead to formation of lymph.
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