Exchange of gases at the alveolusकूपिका पर गैसों का विनिमय

NCERT Figs 14.3, 14.4 · interactive diagram

Parts and their functions

• Alveolus (कूपिका) — Alveolar air: pO₂ 104, pCO₂ 40 mm Hg.
• Pulmonary capillary (फुप्फुसी केशिका) — In: pO₂ 40, pCO₂ 45; out: pO₂ 95, pCO₂ 40.
• O₂ diffuses into blood (O₂ रक्त में) — Gradient 104 → 40 mm Hg.
• CO₂ diffuses out (CO₂ बाहर) — Gradient 45 → 40 mm Hg; high solubility compensates.
• Diffusion membrane (विसरण झिल्ली) — Alveolar epithelium + basement substance + capillary endothelium; < 1 mm.

Original diagram drawn by Simple Learning Hub, based on NCERT Figs 14.3, 14.4. Report a mistake