Question

What is the position of the diaphragm at the time of expiration?

Answer 1

hey mate here i m with your ans as much as i knw here i hve defined it .

ANSWER

when we breadth or inhale, our diaphragm contracts (tightens) and moves downward. This increases the space in our chest cavity, into which our lungs expand. The intercostal muscles between our ribs also help enlarge the chest cavity. They contract to pull our rib cage both upward and outward when we inhale .

hope it helps u

Answer 2

During expiration, explained below points out the position of diaphragm :

When an individual expires the air, the muscle fibres comes to relaxed position and then this results in returning of the diaphragm to its normal position.

So, returning of the diaphragm to its normal position leads to volume decrease of the thoracic cavity. Due to this volume of pulmonary cavity also gets decreased. This then increases the pulmonary cavity's pressure and results in expulsion of air.