Question

Why does foetus respire but not breathe?

Answer 1

The foetus takes in Oxygen and releases Carbon dioxide which can be stated as breathing whereas it does not respire as during respiration breaking of molecules to release energy takes place but the foetus already gets its part of nutrients from the mother through the placenta so it does not respire but just breathes.

Hope this helps..

Answer 2

Question: why does a person whose breath rapidly or deeply for several seconds experiences a short period of time in which respiration does not occur before normal breathing resume

Explanation: when a person whose breath rapidly or deeply for several seconds experiences a short period of time in which respiration does not occur before normal breathing resume it may experiences the lack of oxygen in body and the formation of lactic acid occur due to anaerobic respiration in our body