Question asked by Filo student

lining whereas the inner pleural membrane is in contact with the hung ony 1 causing: surface. The part starting with the external nostrils up to the terminat fhoracic chami ducts form the respiratory or exchange part of the respiratory system, The conducting part transports the atmospheric air to the alveolf, it from foreign particles, humidifies and also brings the air to body temperature. Exchange part is the site between blood and atmospheric air. The lungs are situated in the thoracic chamber which is anatomically an air-tight chamber. The thoracic chamber is for med dorsally by the - dots al $\to$ vertebral the lower side by the dome-shaped diaphragm. The anatomical setup of fimal positions columb lungs in thorax is such that any change in the volume of the thoracic fime and there Ventrally $\to$ Sternum arrangement is essential for breathing, as we cannot directly alter the Catcrath $\to$ ribs pilmonary volume. tome $\to$ daprraym Respiration involves the following steps: Shoped

1. Breathing or pulmonary ventilation by which atmospheric Is drawn in and ${\mathrm{CO}}_2$ rich alveolar air is released out.
2. Diffusion of gases $({\mathrm{O}}_2$ and ${\mathrm{CO}}_2)$ across alveolar membrane.
3. Transport of gases by the blood.
4. Diffusion of ${\mathrm{O}}_2$ and ${\mathrm{CO}}_2$ between blood and tissues.

Views: 5,937 students

Updated on: Jan 20, 2023