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- The thoracic cavity is one of the major body cavities in the trunk.
- The thoracic cavity is also called the chest cavity.
- The thoracic cavity is formed by the ribs, sternum, thoracic vertebral column, and chest muscles.
- The pericardial cavity is a fluid-filled space within the thoracic cavity.
- The pericardial cavity surrounds the heart.
- The prefix peri- means around.
- The root -cardial refers to the heart.
- The pleural cavities are two fluid-filled spaces in the thoracic cavity.
- Each pleural cavity surrounds a lung.
- The root pleur- means rib or side.
- The mediastinum is the central region of the thoracic cavity.
- The mediastinum is located between the lungs.
- The mediastinum extends from the sternum to the vertebral column.
- The mediastinum extends from the first rib to the diaphragm.
- The mediastinum contains all thoracic organs except the lungs.
- Structures in the mediastinum include the heart, esophagus, trachea, thymus, and major blood vessels.
- The diaphragm is a dome-shaped muscle.
- The diaphragm separates the thoracic cavity from the abdominopelvic cavity.
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