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.
Umbilical arteries carry oxygen-poor blood from the fetus and the umbilical vein carries the most oxygen-rich blood to the fetus. Arteries are often described as vessels that carry oxygen-rich blood, and veins are said to carry oxygen âpoor (carbon dioxide-rich) blood. Name two sets of exceptions to this rule that were discussed in this chapter. Pulmonary arteries carry oxygen-poor blood and pulmonary veins carry oxygen-rich blood. Umbilical arteries carry oxygen-poor blood from the fetus and the umbilical vein carries the most oxygen-rich blood to the fetus. Arteries lack valves, but veins have them.