Question

Please send answer ..........................

Answer 1

it's a one line answer 'diffusion' due to difference in pressure the pressure inside out lungs is low whereas the outside environment has higher pressure air tends to move inside our lungs hence as a result we inhale

Answer 2

Hope it helps u...!!

The intercostal muscles between our ribs also helps inlarge the chest cavity. They contract to pull our rib cage both upward and outward when we inhale. As our lungs expand, air (oxygen) is sucked in through our nose or mouth. The wind (oxygen) goes down through our windpipe and reaches the lungs.

Best Wishes Friend...!!