A3.3.1HowOxygenCells - Belle Vernon Area School …

O 2 diffuses into the blood from the alveoli to be carried via the circulatory system to all cells of the body. Every cell in the human body needs oxygen to perform aerobic respiration in the mitochondria. A waste byproduct of cell respiration is CO 2.Carbon dioxide passes by diffusion from the cell into the capillaries where it enters the blood stream and travels via the circulatory system to ... ................
................