upward and downward movement of diaphragm occurs consecutively give scientific reason
Answers
Upper and downward movement of diaphragm occurs consecutively dueing respiration. When we inhale air the diaphgram moves upward and when we exhale air the diaphgram moves downward
when you breath in,or inhale, your diaphragm contracts (tightens) and moves downward . This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your ribs cage both upward and outward when you inhale.
And now when space in chest cavity increases..Volume increases and pressure decreases...And we know air moves from high pressure to low pressure region...So air enters.
Opposite happens during expiration
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