Respiratory system in Man (Dr Mais)
You have read how the blood transports oxygen from the lungs to cells and carries carbon dioxide from the cells to the lungs. It is the function of the respiratory system to transport gases to and from the circulatory system. External respiration is the exchange of gases between the atmosphere and the blood. Cellular respiration is the way that cells obtain their energy – usually using oxygen to break down glucose in the cell (aerobic respiration). This Module examines the structures and mechanisms that carry oxygen to the cells for use in aerobic respiration and that eliminate the carbon dioxide that is produced as a by-prod uct. 1. The function of the breathing system is to get oxygen into the body and waste gases out. These are involved in respiration - a vital function of all living organisms. 2. Respiration occurs at two different levels: A. The level of the cell. In the mitochondria of Eukaryotic cells, aerobic respiration needs O2 to break down glucose. Thu...