Alveolus — Free Physiology Illustration

Physiology

Alveolus

A single pulmonary alveolus shown as a tiny rounded to slightly polygonal or oval, balloon-like air sac with an extremely thin delicate pale pink to light peach semi-translucent wall and a hollow central air space. The contour is smooth to slightly lobulated, grape-like or bubble-like, with a subtle membranous outline and sometimes faint wrinkling or dimpling. A small short neck-like opening on one side indicates connection to an alveolar duct or tiny airway. The outer surface may show subtle capillary impressions or fine honeycomb-like texture, suitable for a simple histology-style microscopic or clean anatomical clipart depiction.

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