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.
The placenta is formed by cells that originate from the foetus and is therefore the first of the foetal organs to develop. What does the placenta do? The placenta contains a complex network of blood vessels that allow the exchange of nutrients and gases between the mother and the developing foetus. The blood supply of the mother does not actually mix with that of the foetus; this exchange occurs by diffusion of gases and transport of nutrients between the two blood supplies (see figure). The transfer of nutrients and oxygen from the mother to the foetus, and waste products and carbon dioxide back from the foetus to the mother, allows the growth and development of the foetus throughout pregnancy.