NEET PG DENTAL EXAM

Detailed explanation-1: -Expiration (exhalation) is the process of letting air out of the lungs during the breathing cycle. During expiration, the relaxation of the diaphragm and elastic recoil of tissue decreases the thoracic volume and increases the intraalveolar pressure. Expiration pushes air out of the lungs.

Detailed explanation-2: -The second phase is called expiration, or exhaling. 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-3: -Breathing, also known as ventilation, is how the air moves into and out of the lungs. It consists of repetitive cycles of inspiration, when air flows into the lungs; expiration, when air leaves the lungs; and a brief pause, called the rest period, between these two.