Presentation on theme: "The Respiratory System. The system of the body that deals with breathing The body takes in the oxygen that it needs and removes the carbon dioxide that."— Presentation transcript:
Pathway of Oxygen Inside the lung, the bronchi divide into smaller and smaller tubes called bronchioles. At the end of each of these tubes are small air sacs called alveoli. Capillaries, which are small blood vessels with thin walls, are wrapped around these alveoli.
Pathway of Oxygen Oxygen diffuses through the capillaries into the bloodstream. Carbon dioxide in the bloodstream, diffuses through into the alveoli, and is then removed from the body when we breathe out.
The Diaphragm The diaphragm flattens to cause the chest to expand and air is pulled into the lungs. The muscle that controls the breathing process. When the diaphragm relaxes, the chest collapses and the air in the lungs is forced out.
Common Respiratory Diseases Asthma is a common chronic (re-occurring) inflammatory (swelling) disease of the airways. Symptoms include wheezing, coughing, chest tightness, and shortness of breath. Lung cancer is a disease which consists of uncontrolled cell growth in tissues of the lung. This growth may lead to metastasis, which is the invasion of near by tissue and infiltration beyond the lungs (spread).