100m2
Vh
The pleura is a membrane that surrounds the lungs of mammals. Presumably, the phrase means that the surface of the pleura was found to be normal in an examination.
The skin surface is not large enough for big creatures such as humans; therefore we have structures in our lungs that greatly increase the surface area.
If the surface area of the organism is small, then there is no problem with getting all the oxygen needed. If the surface area of the organism is large, therefore a special respiratory surface is needed. An example is lungs, gills. The ratio of surface area to volume in a small organism is greater than the ratio in a large organism.
The surface area of the alveoli is where oxygen and carbon dioxide are exchanged across membranes. A large surface area enables a greater amount of gas transfer. The skin has two main functions: one is holding all our bits in one place and the other is to maintain body temerature. In the latter role, a large surface area is good for cooling the body but bad for keeping warm. So it is a compromise.
Alveolar sac and alveoli
lungs
function of alveolar macrophagesThe function of alveolar macrophage in the lungs is to remove dust particles and other debris from alveolar spaces. -SheshiAveolar macrophages work to break up surfactanct in the aveoli which exists to decrease surface tension in the lungs. If there is a disorder where the macrophage does not function correctly, such as in PAP, the surfactant will not be broken up and decreased ventilation will occur resulting in less oxygen delivery.
the natural tendency for the lungs to recoil and the surface tension of the alveolar fluid
Gaseous exchange is the movement of oxygen in the body, it takes place in the lungs through diffusion by the alveolar surface. There are millions of alveloi in the lungs, which gives it around 70m2 of exchange surface.
Pulmonary surfactant...see link for more information.
Pulmonary alveolar proteinosis (PAP) is a rare disease of the lungs.
Interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid.
Type 1 alveolar cells
An alveolar dead space is the volume of air in the alveoli of the lungs which does not partake in gas exchange.
The ciliated columnar epithelium lines the trachea(windpipe) and bronchi(lungs). The squamous epithelium forms the delicate lining of cavities(nose and alveoli etc.)
no we cant as we have lungs and fish have gills...