Arteries carry blood away from the heart, and veins carry blood toward the heart. Capillaries connect the arteries to the veins throughout the body. Fun Fact: If all the blood vessels from a child's size body were lined up in a row, they would form a line more than 60,000 miles long.
Fats in Butter. Butter is about 80% fat, and the rest is mostly water. Basically, it is the fatty portion of milk that has been isolated from the protein and carbs. Butter is one of the most complex of all dietary fats, containing more than 400 different fatty acids. It is very high in saturated (about 70%) fatty acids, and contains a fair amount of monounsaturated fatty acids (about 25%).
There are three main types of nutrients: carbohydrate, protein and fat. Butter is almost exclusively fat -- the protein and carbohydrate content in a stick of unsalted butter totals less than 1 gram. Butter is high in saturated fat, a type of unhealthy solid fat that tends to raise your cholesterol levels. One stick of unsalted butter -- a common measure in baking -- contains about 810 calories and 58 grams of saturated fat. Each 1 tablespoon of butter contains 113 calories and 11.5 grams of fat.