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%).
Answers from Katherine Zeratsky, R.D., L.D. Monounsaturated fatty acids (MUFAs) are a healthy type of fat. Replacing less healthy fats, such as saturated fats and trans fats, with unsaturated fats, such as MUFAs and polyunsaturated fats, may offer health benefits. Consuming monounsaturated fatty acids may help lower your risk of heart disease by improving your risk factors. For instance, MUFAs may lower your total and low-density lipoprotein (LDL) cholesterol levels but maintain your high-density lipoprotein (HDL) cholesterol level.