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.
Report Abuse. For a 15.5 gallon keg, you can serve 198.4 beers(10oz.). However, servings are typically 12oz. and keg cups are 16oz. You can serve 165 12oz. and 124 16oz. 128oz = 1 gallon.esides the half barrel 15 gallon domestic, the keg family also includes a 13.2 gallon import keg, the 7.75 gallon pony or quarter barrel keg, and the 5-gallon sixth barrel keg.