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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

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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
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