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 15.5 U.S. gallon keg is also equal to: 1  12.69 Imperial gallons. 2  58.67 liters. 3  103.25 Imperial pints. 4  124 U.S. pints. 5  165 twelve fluid ounce drinks. 6  About 6.88 24-unit cases of 12 fl oz cans. 7  1984 fluid ounces.