GENERAL HISTOLOGY

Detailed explanation-1: -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-2: -Exhalation (or expiration) is the flow of the respiratory current out of the organism. In humans it is the movement of air out of the bronchial tubes, through the airways, to the external environment during breathing.

Detailed explanation-3: -The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

Detailed explanation-4: -We refer to exhalation as ‘breathing out’. Thus, you see that it is the opposite of inhalation. In this movement, the air from the lungs moves out of the airways into the external environment. The air we exhale is rich in carbon dioxide and is a waste product of cellular respiration when we produce energy.

Detailed explanation-5: -Exhalation is a part of breathing where the air is drawn out of the lungs by the relaxation of respiratory muscles.