NEET BIOLOGY

Detailed explanation-1: -When the lungs exhale, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases. As a result, the lungs contract and air is forced out.

Detailed explanation-2: -As your diaphragm flattens, it creates more space and reduces pressure in the chest cavity and this pressure change forces air into your lungs. When your diaphragm muscle relaxes, it re-forms the dome shape, which reduces space in the chest cavity and allows air to flow out of the lungs.

Detailed explanation-3: -Expiration occurs when the diaphragm and external intercostal muscles relax. In response, the elastic fibers in lung tissue cause the lungs to recoil to their original volume. The pressure of the air inside the lungs then increases above the air pressure outside the body, and air rushes out.

Detailed explanation-4: -The diaphragm is another crucial structure which makes breathing possible. While all other muscles mostly change the anteroposterior diameter of the chest cavity, the diaphragm lengthens and shortens the cavity by moving up and down. This action also expands and contracts the lungs.

Detailed explanation-5: -When you exhale: the intercostal muscles relax pulling the ribcage downwards and inwards. the diaphragm relaxes, doming upwards. volume of the thorax decreases and the pressure inside increases.