Why does your chest expand when you breathe in air ?
Answers
Answered by
6
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 inhale.
Answered by
0
Answer:
when air is drawn in, ribs move out and diaphragm moves down similarly when air is forced out ribs move back as well as he diaphragm
Explanation:
Similar questions