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People living at sea level have around 5...

People living at sea level have around `5` million RBC per cubic millimetre of their blood whereas those living at an altitude of `5400` metres have around `8` million. This is because at high altitude.

A

Atmospheirc `O_2` level is less and hence more RBCs are needed to absorb the required amount of `O_2` to survive

B

There is more UV radiation which enhances RBC production

C

People eat more nutritive food, therefore move RBCs are formed

D

People get pollution - free air to breathe and more oxygen is available.

Text Solution

Verified by Experts

The correct Answer is:
A
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