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Lung: Cell Types Composing the Tissue

The lungs are the main site of gaseous exchange and are composed of a vast array of cells. Our focus in this article is the cells and tissues lining the respiratory passageways and how they come together to function as a unit called the respiratory system.

Respiratory Zones

The thorax is the part of our body that extends from the neck to a dome-like muscle called the diaphragm. It is enclosed by the ribs and contains the heart and the lungs. There are two lungs in the chest, one on the right side and one on left. The lungs are spongy organs located inside the rib cage, and their basic function is gas exchange. They perform this task by absorbing oxygen (O2) from air during inhalation. ...

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