Answer:

The process of breathing in is called inspiration and the process of breath out is called expiration. both of these processes together are termed as respiration.

When we breathe in air, the diaphragm contracts

and pulls downward increasing the volume. At the same time, the muscles in between the ribs contract ( intercostal muscles) and pull upward. This increases the size of the thoracic cavity further and thus decreases the pressure inside (in accordance with Boyles law). As a result, air rushes in and fills the lungs. This whole process is called inspiration. Expiration is the complete opposite of it wherein the pressure increases and pushes air out due to decrease in volume of thoracic cavity.

Verified answer

Answer:

Inspiration (inhalation) is the process of taking air into the lungs. It is the active phase of ventilation because it is the result of muscle contraction. During inspiration, the diaphragm contracts and the thoracic cavity increases in volume. This decreases the intraalveolar pressure so that air flows into the lungs.

Explanation:

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