Question

1.during exercise the rate of respiration increses why
2.why wind pipe doesn't collapse whether there is no air

Answer 1

this a bit gud question yar
during excercise your heart continuously beat thus it needs to supply more oxygen to the muscle as it is in need to the extend so during excercise the rate of respiration increases
and the next question is like the trachea that is the wind pipe is surrounded by the C shaped cartilagenous rings thus it gives support to not to collapse of the wind pipe
hope thi helps u....

Answer 2

A During vigorous exercise the rate of respiration increases as there is more demand of energy by the body and supply of oxygen is less. So the rate of respiration increases to meet the needs of the body
B Wind pipe does not collapse as there are structures present called cartilegenous rings. They keep the wind pipe distended and prevent from collapse.
Hope this helps. Please mark it as brainliest