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.
Swat or SWAT may refer to: SWAT (Special Weapons and Tactics), a paramilitary unit of law-enforcement agencies Swatting, a hoax intended to provoke a response from SWAT or other emergency personnel.
Created in 1983, The FBI Enhanced Special Weapons and Tactics (SWAT) Teams are trained to intervene in high-risk situations. Their expertise includes hostage rescues, aircraft hijackings, tracking fugitives, stronghold and tubular assaults, and specialized sniper operations.