expiration

(ĕks″pĭ-rā′shŭn )

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[Gr. ex, out, + L. spirare, to breathe]

1. Expulsion of air from the lungs in breathing. Normally the ratio of the duration of inspiration to expiration is 1:3. Exhalation takes longer than inspiration because exhalation occurs passively.
SEE: diaphragm for illus.; SEE: inspiration; SEE: respiration
2. Death.

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