Question

which of these allow exchange of gasses.
1.respiration
2.digestion
3.Excretion
4. none of these​

Answer 1

Answer:

RESPIRATION ALLOWS EXCHANGE OF GASES.

Explanation:

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Answer 2

Answer:

Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of

tiny blood vessels called capillaries, which are located in the walls of the alveoli.

1. respiration is correct