Name: Discovery of Gases and Respiration
Uploaded: 2019-07-19
Duration: 6 min 24 s
Description: We all know we breathe in oxygen and breathe out carbon dioxide. But how was this discovered? Watch this experiment to learn more about it in detail.

Question

Distinguish between inspiration and expiration.

Accepted Answer

Feature Inspiration Expiration

Meaning Inspiration is the act of drawing air into the lungs. Expiration is the act of releasing air from the lungs through nose or mouth.

Feature Inspiration Expiration

Role of different respiratory muscles During inspiration, the intercostal muscles initiate contraction of the diaphragm. This increases the volume of the thoracic chamber. Ribs and diaphragm are moved upwards. The intercostal muscles and the diaphragm relax and move to their original position. Ribs and sternum return to their original position. The volume inside the thoracic chamber reduces.

Feature Inspiration Expiration

Pressure difference The pressure inside the lungs becomes less than atmospheric pressure. This difference in pressure causes air to move inside the lungs. During this atmospheric air is drawn in. The pressure inside the lungs becomes more than the atmospheric pressure, and the air is forced out of the lungs. During this, the alveolar air is moved out.

Distinguish between inspiration and expiration.

Important Questions on Breathing and Respiration

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