The air reaches the tiny air sacs (alveoli) in the inner part of the lungs with any dust particles that avoided the defenses in the nose and airways. The air sacs are very important because through them, the body receives oxygen and releases carbon dioxide.
1 A full size keg holds about 15.5 gallons (165 12-oz cups) and is sometimes referred to as a 1/2 keg. 2  The full-size kegs typically start at about $100 for American draft beers. 3  Specialty beers, lagers and ales can cost from $125-$250.
A blend of the words âkegâ and ârefrigerator,â a kegerator is an at-home draft (draught) beer dispensing device. A keg, typically of beer, is stored in a refrigerated container in order to keep it chilled, allowing you to keep beer for extended periods of time without losing quality or freshness.uarter Barrel â Also known as a pony keg, this âhalf-sizeâ keg has approximately half the capacity of a standard, half barrel keg. This keg measures 13â inches tall, 16â inches in diameter, and weighs about 87 pound when full. It holds 7.75 gallons, the equivalent of eighty-two 12oz cans of beer or sixty-two pints.