Lung Protection: Layers and Supporting Structures
The lungs are shielded by multiple layers:
- Skin: Outermost physical barrier.
- Subcutaneous Tissue: Fat and connective tissue for insulation and trauma protection.
- Chest Wall Muscles: Support lungs and drive ventilation.
- Pleura: Double-layered membrane lining chest cavity and covering lungs; pleural fluid lubricates movement.
- Bronchial Tree: Airway network with mucus-producing cells trapping particles.
- Alveoli: Tiny gas-exchange sacs surrounded by capillaries for O₂/CO₂ diffusion.
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