Each kidney is about 4 or 5 inches long -- about the size of a fist. The kidneys' function are to filter the blood. All the blood in our bodies passes through the kidneys several times a day. The kidneys remove wastes, control the body's fluid balance, and regulate the balance of electrolytes.
Caffeine by Type of Brewed Coffee. Like all coffee drinks, caffeine levels vary greatly - due to variations in coffee blend, exact amount of ground coffee used, and brewing technique. The value of caffeine in brewed coffee featured above is an average, with values generally between 64 and 272 milligrams per cup. Because brewed coffee requires that the water is in contact with the grinds for a long time, this leads to a higher caffeine concentration (and sometimes an over-extracted taste).
Caffeine in Coffee. The exact amount of caffeine in a cup of coffee will vary depending on how strong you make it, although youâll typically get roughly 95 milligrams from an 8-ounce freshly brewed cup.n those days when you need that extra kick and order a shot of espresso to add to your coffee, youâll pack in another 65 milligrams of caffeine from just 1 ounce of espresso. Youâll even get a small amount of caffeine from decaf coffee. One cup of decaf can have close to 10 milligrams of caffeine.