Ni kwa nini tujapiga miayo

Ni kwa nini tujapiga miayo

Yaleyale

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Salama wana JF, napenda kujua ni kwa nini tunapiga mihayo kisayansi. Na ina faida gani kwa anayepiga mihayo kwenye mwili wake? Najua ni tendo lisilo hiari, but why?
 
Low partial pressure of Oxygen to the brain-to overcome -inhale deeply thrice
 
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