Describe the inward forces of elastic recoil, and explain why the lungs do not normally collapse during expiration

What will be an ideal response


Elastic recoil is the recoil of elastic fibers stretched during inspiration and the pull of the surface tension of alveolar fluid. Intrapleural pressure is always subatmospheric during normal breathing, which tends to pull lungs outward and to keep alveolar pressure from equalizing with atmospheric pressure. Surfactant in alveolar fluid decreases surface tension to help prevent collapse.

Anatomy & Physiology

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