Respiratory System & Alveolar Gas Exchange – 3D Interactive Model | NCERT Class 11 · Breathing & Exchange of Gases

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Cross-section

Nasal cavity
Trachea & bronchi
Lungs
Diaphragm
Capillary
O₂ molecules
CO₂ molecules

Watch the lungs and diaphragm breathe · zoom to the alveolus for the O₂/CO₂ swap

Source: NCERT Class 11 Biology, Ch. 17 — Breathing & Exchange of Gases (also Class 10 Life Processes) · Interactive 3D learning model

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