Question

What will happen when diaphragm relaxes and curves upwards? *
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Answer 1

Answer:

A large dome-shaped muscle under the lungs called the diaphragm squeezes downward when you breathe in, making a vacuum that causes a rush of fresh air into your lungs. The opposite happens when you breathe out -- your diaphragm relaxes upward, pushing on your lungs, letting them deflate.

Answer 2

Answer:

When the diaphragm relaxes and curves upwards air is forced out of lungs...

Explanation:

hope it helps...................