Labeled Diagram Of Alveoli. The large surface area makes gas exchange with the. It also receives waste carbon dioxide from the blood and exhales it.
There are approximately 700 million alveoli in the lungs covering a total surface area of about 70 m 2 which is a considerably larger surface area relative to volume. The walls of the alveoli are composed of the pulmonary capillary sheet. Alveoli are the endpoint of the respiratory system which starts when we inhale air into the mouth or nose.
To borrow this diagram from gill et al 1979 one can see that ones alveoli are only vaguely spherical when they are distended and in a collapsed state they take on a sorry folded looking shape.
This is the term used to describe the tree like structure of passageways that brings air into the lungs. Hilum and root of lungs 4. You will get little information on pneumocytes from lung histology diagram. This thinness facilitates faster oxygenation.