Heart Attack Essay

772 words - 4 pages

THE CARDIO RESPITORY SYSTEM The respitory system The function of the respiratory system is to supply the body with oxygen and dispose of the waste product carbon dioxide. This takes place when we breathe the process of breathing air in is called inspiration, expiration (breathing out). As inspiration takes place oxygen enters the body via the mouth and nose, the nasal cavity warms the air during its passage, the nerve endings which are located in the roof of the nose pick up the different odours we smell. Oxygen then begins the journey to the lungs, entering the upper respiratory tract which consists of. Pharynx: The throat, a cone shape cavity in the back of the mouth, prevents the ...view middle of the document...

Carbon dioxide has three forms of transportation from body tissue one way is in the plasma, as plasma is made of 90% water very little travels this way as carbon dioxide is not very soluble. Carbon dioxide can also attach its self to the amino group in the haemoglobin molecules which forms carbonate ions allowing transportation via blood flow. A reaction between carbon dioxide and water forms carbonic acid which then forms hydrogen carbonate this binds with the haemoglobin and again allows transportation via blood flow. (Anang 2008) The lungs are spongy which allow them to expand when inspiration takes place this procedure is assisted by the main respiratory muscle the diaphragm. The diaphragm separates the thorax (chest cavity) and the abdomen, the phrenic nerve is what controls the diaphragm as the diaphragm contracts the lungs expand taking in air, when the diaphragm does relax expiration takes place and carbon dioxide exits the body. (m.terminoloy 2004) Deoxygenated blood enters the heart via the superior vena cava and the inferior vena cava, the superior vena cava is transporting blood from the upper part of the body (cranial/anterior) the inferior vena cava takes blood from the lower part of the body...

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