Mediastinum

Mediastinum - Term Definition Mediastinum extends from The...

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Term: Mediastinum extends from Definition: The sternum to the bodies of the vertebrae and from the superior thoracic aperture to the diaphragm. Term: Mediastinum contains what Definition: The thymus gland, pericardial sac, heart, trachea, and major arteries and veins. Term: Middle mediastinum Definition: Centrally located in the thoracic cavity. Contains pericardium, heart, origins of the great vessels, various nerves, and smaller vessels. Term: Pericardium is a what Definition: Fibroserous sac surrounding the heart and the roots of the great vessels. Term: Consist of what? Definition: Fibrous pericardium and serous pericardium
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Term: Fibrous pericardium Definition: Tough connective tissue outer layer that defines the boundaries of the middle mediastinum. Term: Serous pericardium Definition: Parietal layer lines the inner surface of fibrous. Visceral layer of serous pericardium adheres to the heart and forms its outer covering. Term: Pericardial cavity Definition: Narrow space created between the two layers of serous pericardium, containing a small amount of fluid, allows for uninhibited movement of the heart. Term: Fibrous pericardium has a base and apex where? Definition: On the diaphragm and is continuous with the adventitious of the great vessels. Term: Base is attached to the Definition: Central tendon of the diaphragm and to a small muscular area of the diaphragm on the left side.
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Term: Anteriorly, base is attached to the posterior surface of the sternum by what Definition: Sternopericardial ligaments, which help to retain the heart in its position in the thoracic cavity. The sac also limits cardiac distension, Term: What innervates the fibrous pericardium Definition: Phrenic nerves Term: What is also within and supply the fibrous pericardium Definition: Pericardicophrenic vessels. Term: Serous pericardium occur in two locations Definition: Sup. surrounding the arteries, the aorta, and pulmonary trunk. The second more pos. surrounding the veins, sup and inf vena cava and pulmonary veins Term: Oblique pericardial sinus Definition: Cul de sac formed within the J. Posterior to the left atrium.
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Term: Transverse pericardial sinus Definition: A passage between the two sites of reflected serous pericardium. Lies posteriorly to the ascending aorta and the pulmonary trunk, anteriorly to the sup vena cava, and sup to the left atrium. Term: When the pericardium is opened anteriorly during surgery Definition: A finger placed in the transverse sinus separates arteries from veins. Term: Pericardium is supplied by branches from Definition: The internal thoracic, pericardicophrenic, musculophrenic, and inferior phrenic arteries, and the thoracic aorta. Term: Veins from the pericardium enter Definition: The Azygos system of veins and the internal thoracic and superior thoracic veins.
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Term: Nerves supplying the pericardium Definition: Arise from the vagus nerve, the sympathetic trunks, and the phrenic nerve Term: Where's the source of somatic sensation or pain Definition: Carried by somatic afferents fibers in
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