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Heart: Your heart is a muscular organ that pumps blood throughout your body. It’s located in the middle of your mediastinum. Your heart is surrounded by a protective sac called your pericardium. Thymus: Your thymus supports your immune system and is most active before puberty. It’s located in the front, upper part of your mediastinum.
Nov 3, 2023 · The mediastinum is an area found in the midline of the thoracic cavity, that is surrounded by the left and right pleural sacs. It is divided into the superior and inferior mediastinum, of which the latter is larger. The inferior mediastinum is further divided into the anterior, middle and posterior mediastinum. Every compartment of the ...
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Heart Anatomy. Size, Location, and orientation The heart is around the size of a fist and weighs between 250-350 grams (less than a pound). Enclosed within the mediastinum, the medial cavity of the thorax, the heart extends obliquely from the second rib to the fifth intercostal space. It rests on the superior surface of the diaphragm, lies ...
Sep 14, 2021 · Within the mediastinum, the heart is separated from the other mediastinal structures by a tough membrane known as the pericardium, or pericardial sac, and sits in its own space called the pericardial cavity. The dorsal surface of the heart lies near the bodies of the vertebrae, and its anterior surface sits deep to the sternum and costal cartilages.
Sep 18, 2024 · Definition of Mediastinum . The mediastinum is the area in the chest between the lungs that contains the heart, part of the windpipe (the trachea), the esophagus, and the great vessels including the ascending aorta (the large artery which carries blood from the left ventricle of the heart on its way to the rest of the body) and right and left pulmonary arteries—essentially all of the organs ...
mediastinum, the anatomic region located between the lungs that contains all the principal tissues and organs of the chest except the lungs. It extends from the sternum, or breastbone, back to the vertebral column and is bounded laterally by the pericardium, the membrane enclosing the heart, and the mediastinal pleurae, membranes that are continuous with those lining the thoracic cage.
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Oct 20, 2024 · The heart is located within the thoracic cavity, medially between the lungs in the mediastinum. It is about the size of a fist, is broad at the top, and tapers toward the base. (Caption from OpenStax) (Image credits: "Blausen 0467 - Heart position relative to the rib cage - English labels" by Blausen.com staff (2014) , license: CC BY .
