In this article we will discuss about the subdivisions of lungs and capacities obtained by a spirometer with the help of suitable diagrams. 1. Lung Volumes: (i) Tidal Volume (TV = 500 ml): The TV (or Resting Tidal Volume, RTV) is the volume of air breathed in and out during quiet respiration (about 500 ml). (ii) Respiratory Minute Volume (RMV): [...]
In this article we will discuss about the External and Internal Structure of Lungs. External Structure of Lungs: The lungs are soft, spongy and elastic organs which are pinkish in colour. The upper most portion of each lung is called the apex and the inferior most portion is called the base. The costal surfaces of the lungs are so named [...]
The following points highlight the top five processes for diffusion of gases in the lungs. 1. When the gases of the inspired air come in contact with the alveolar membrane of the lung, the exchange of gases takes place following the usual laws of diffusion. Thus, the gas passes into the blood through the membrane. 2. The gas pressure in [...]