The herb Indian spikenard is another effective home remedy for low blood pressure. It should be taken in doses of thirty to forty grains with a pinch of a little camphor and cinnamon (cinnamon). An infusion can also be prepared by steeping 15 to 20 gm of the herb in 250 ml of boiling water, and taking it thrice a day.
Alveoli. Alveoli are the functional units of the lungs that permit gas exchange between the air in the lungs and the blood in the capillaries of the lungs. Alveoli are found in small clusters called alveolar sacs at the end of the terminal bronchiole.
To review, humans need a large surface area for gas exchange and need to easily transfer gases between the blood and the air. Specialized structures in the lungs called alveoli dramatically increase the surface area of the lung and the dense capillary network around the alveoli creates a very short route between the bloodstream and the air.