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Question

The absorption of nutrients and exchange of respiratory gases between blood and tissues takes through _______.

A
arteries
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B
capillaries
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C
veins
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D
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Solution

The correct option is B capillaries
  • Capillaries are a network of blood vessels which emerge from arteries and reunite to form veins.
  • Being the thinnest blood vessels, only oxygen, glucose and water pass through the capillary walls and enter the cells.
  • Waste products such as carbon dioxide pass back from the cells into the blood capillaries and is taken back to the veins.

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