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The Respiratory System
Beginning of essay
The main job of is to provide oxygen to the blood, and release the carbon dioxide left over from the spent blood, works with the cardiovascular system to make this happen. Blood enters the lungs through the pulmonary circulation and is dark colored, low in oxygen, and high in carbon dioxide. It i ....
Middle of essay
.... the other, are connected by muscular and fibrous tissue. The trachea is about 10-cm (4.5 in) long and 2.5 cm (1 in) in diameter. It is lined internally with a mucous membrane. The trachea can get respiratory infections very easily
The lungs are enclosed in the thorax. The ribs support the body wall of the thorax, which has a domed base formed by the diaphragm. The ribs slant downward and forward; when they are raised by the action of muscles, the volume of the thorax is increased. The volume of.... |
| Number of words: 763 |
Approximate pages: 3 |
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