Thoracic cavity
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| Thoracic cavity | |
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| The thorax from the right. | |
| Latin | cavitas thoracis |
| Gray's | subject #136 524 |
| Dorlands/Elsevier | c_16/12220616 |
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Overview
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:
- structures of the cardiovascular system, including the heart and great vessels, which include the thoracic aorta, the pulmonary artery and all its branches, the superior and inferior vena cava, the pulmonary veins, and the azygos vein
- structures of the respiratory system, including the trachea, bronchi and lungs
- structures of the digestive system, including the esophagus,
- endocrine glands, including the thymus gland,
- structures of the nervous system including the paired vagus nerves, and the paired sympathetic chains,
- lymphatics including the thoracic duct.
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
- thoracic+cavity at eMedicine Dictionary
- chest+wall at eMedicine Dictionary (also known as "thoracic wall")
- Norman/Georgetown thoraxlesson3
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
