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Mechanism of Pulmonary Respiration (Mechanism of breathing)

Respiration involves two phases, the inspiration and expiration

Inspiration; it is an active process by which fresh air enters in the lungs. During inspiration the thoracic cavity is enlarged and muscles which are involved in this process are called inspiratory muscles.

Muscles of inspiration Following muscles are involved in this process

  • Diaphragm. It is the main muscle of inspiration. It separates the thorax and abdomen. During inspiration it contracts, becomes flat and gets lowered thereby increases the volume of thoracic cavity in length. It moves 1 to 1.5 cm during normal breathing and during deep breathing it… (498 more words) …

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Transport of Carbon Dioxide

Transport of Carbon dioxide during the oxidation of food carbon dioxide, water and energy are produced. Carbon dioxide diffuses out of the cells in the blood of capillaries, where it is transported as follows

  • As dissolved in plasma. Because of its high solubility 7% of it is carried in this form, from tissues to lun
  • In bicarbonate form. About 70% is carried in this form. The capillary blood takes up the CO2 in plasma. From plasma CO2 enters in the RBCs where it combines with water to form carbonic acid (H2CO3) in… (329 more words) …

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