Question

What happens when we breath in?

Answer 1

Answer:

When you breathe 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 rib cage both upward and outward when you inhal.

Hope you it is helpful​.

Answer 2

Answer:

here's your answer

Explanation:

when we breath the air enter to our lungs through nostrils the hair present in the nostrils capture the dust particles and allow the fresh air to go inside then the air goes to lungs through bronchioles then the air goes through alveoli and there the exchange of air takes place and carbon dioxide comes out through the same path thanks may this answer be helpful to you