I often noticed during the normal death of any one else (aged) a sound comes out like heavily cought cough .?

Question

Why a aged human being sounds as a heavily cough patient at the time of last few minutes before death ?
Please answer perfectly.
Pradip

Answer 1

Thats b cos of every cells from brain to legs are in lack of oxygen and a vacuum created inside.

Answer 2

THIS SOUND IS CAUSED BY THE FAILING HEART UNABLE TO SUPPLY ENOUGH AIR TO THE LUNG IN THE LAST MINUTES OF LIFE.
THE COUGH IS A NORMAL REACTION TO THE BODY ASKING FOR MORE AIR.
PETER

Answer 3

because their health is fully lack of energy when they inhale the air into their body,they got the energy.this leads to the death of that person , pradip