Human respiratory systemमानव श्वसन तंत्र

NCERT Fig 14.1 · interactive diagram

Parts and their functions

• Nasal chamber (नासा कक्ष) — Reached through nostrils and nasal passage; filters and warms air.
• Pharynx (ग्रसनी) — Common passage for food and air.
• Larynx (कंठ) — Cartilaginous box for sound production — the sound box.
• Epiglottis (घाँटी ढक्कन) — Thin elastic cartilaginous flap that covers the glottis during swallowing.
• Trachea (श्वासनली) — Straight tube to mid-thorax; supported by incomplete cartilaginous rings; divides at the 5th thoracic vertebra.
• Bronchi and bronchioles (श्वसनी और श्वसनिकाएँ) — Primary → secondary → tertiary bronchi → very thin terminal bronchioles.
• Alveoli (कूपिकाएँ) — Thin, vascularised bags — the primary sites of gas exchange.
• Lungs (फेफड़े) — Branching network of bronchi, bronchioles and alveoli.
• Pleura (फुप्फुसावरण) — Double layer with pleural fluid; reduces friction on the lung surface.
• Diaphragm (डायाफ्राम) — Dome-shaped muscle forming the floor of the air-tight thoracic chamber.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 14.1. Report a mistake