chest cavity

The thoracic cavity (or chest cavity) is the chamber of the human body (and other animal bodies) that is protected by the thoracic wall (thoracic cage and associated skin, muscle, and fascia).

Components

Structures within the thoracic cavity include:

It contains three potential spaces lined with mesothelium: the paired pleural cavities and the pericardial cavity. The mediastinum comprises those organs which lie in the centre of the chest between the lungs.

Boundaries

The thoracic cavity is separated from the abdominal cavity by the diaphragm. The thoracic inlet is the upper limit of the thoracic cavity, formed by the manubrium in front, the first ribs laterally, and the spine posteriorly.

Clinical significance

If the pleural cavity is breached from the outside, as by a bullet wound or knife wound, a pneumothorax, or air in the cavity, may result. If the volume of air is significant, one or both lungs may collapse, which requires immediate medical attention.

External links

  • (also known as "thoracic wall")

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