Various Systems of Human Body
MECHANISM OF RESPIRATION
The respiratory centre is in Medulla Oblongata. Mechanism of breathing involves two phases
- Expiration
- Inspiration
Lungs :
lungs are present in the thoracic cavity on either side of the heart. covered by a pleural membrane.
Gaseous Exchange :
Gaseous exchange occurs in Alveoli following pressure gradient O2 from high pressure in alveoli diffuse into blood & CO2 from blood in alveoli.
Gaseous Transport:
O2 is carried by haemoglobin (in RBC). 100 ml of blood can carry ~20 ml of O2 max, CO2 is transported in form of bicarbonates in plasma.
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