Inspiration (medicine)

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The respiratory muscles during a "calm" breathing cycle. The inhalation (inhalation) on the left side of the picture, the expiration (exhalation) on the right side. The contracting muscles are shown in red, the relaxed ones are shown in blue.

In medicine, inspiration (from the Latin inspiratio “to breathe in, to breathe in”) refers to the process of “inhalation”, whereby the chest muscles and the diaphragm are contracted to increase the volume of the chest and the resulting negative pressure causes the lungs to expand Passively stretches its elasticity and thereby allows the air to flow through the airways into the alveoli of the lungs.

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Wiktionary: Inspiration  - explanations of meanings, word origins, synonyms, translations