Chemistry

Beard

11 November, 00:53

Manned missions into the far reaches of outer space could require astronauts to be in weightless environments for years at-a-time. Which of these is an effect of prolonged weightlessness on the human body?

A.

a stronger heart

B.

a loss of bone mass

C.

a weaker immune system

D.

a lack of sleep

+1

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