Aspartame was first approved in the United States in 1981 and is one of the most widely used artificial sweeteners. When metabolized by the body, aspartame is broken down into two common amino acids, aspartic acid and phenylalanine, and a third substance, methanol.
Plasma is the liquid part of the blood. Arteries are blood vessels that carry oxygen rich blood away from the heart. Capillaries are tiny blood vessels that connect arteries to veins. Nutrients, oxygen and wastes pass in and out of your blood through the capillary walls.Veins carry blood back toward your heart.rteries are blood vessels that carry oxygen rich blood away from the heart. Capillaries are tiny blood vessels that connect arteries to veins. Nutrients, oxygen and wastes pass in and out of your blood through the capillary walls. Veins carry blood back toward your heart.
Arteries usually carry oxygen-rich blood. The exception is the pulmonary artery, which carries oxygen-poor blood from the right ventricle to the lungs. Arterioles are smaller arteries that carry oxygen-rich blood.he pulmonary veins, carrying blood from the lungs to the left atrium of the heart, are the only veins carrying oxygenated blood. Oxygen rich blood from the lungs is returned to the heart via the pulmonary vein.