Answer
if human being don't respire then how can their heart work
I
Respiration
for respiration of ATP
To die
Respiration
if cellular respiration does not take place, even a normal human would die... athletes are human too... no?
Diffusion is a body process that does not require energy from respiration.
Just like a human being, a rat has aerobic respiration. An aerobic respiration is the type where oxygen is required to convert food to energy.
Human cells are eukariyotic. So they have mitochondria
During aerobic respiration, oxygen and glucose are used. At the end of the process, water and carbon dioxide are released accompanied by energy.
lungs