Question

7.
Describe the changes that take place (i) around the rib cage (ii) diaphragm
(iii) chest cavity, during inspiration. State the effect of these changes.

please I want the answer​

Answer 1

Answer:

1. 1•Around the ribcage during inspiration the intercostal muscles contract.
2. 2.The diapharagram contract(moves down) lungs moves down as wall as out.ward
3. 3.the chest cavity moves out ward due to intercostal muscle and diapharagram contraction.

Explanation:

1. Due to this changes pressure in the lungs decreses because volume increases and know that air moves from higher pressure region to the lower pressure region so air moves inside the lungs.