Where is the human heart located in the chest?

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Illustration of a human heart cross-section showing four chambers-left and right atria and ventricles-with labeled major blood vessels. An inset highlights cardiac muscle tissue, showing myocytes and intercalated disks. — human cardiovascular system The human heart is both a pump and a muscle. Its four chambers move blood efficiently, while cardiac muscle cells joined by intercalated disks synchronize each contraction.

The human heart is located within the thoracic cavity, specifically within a central space known as the mediastinum, which is situated between the lungs.312

Its precise position is defined by the following anatomical relationships:
* Behind the sternum (breastbone).32
* Above the diaphragm, the muscular partition separating the chest and abdominal cavities.32
* In front of the trachea, the esophagus, and the descending aorta.3

The heart is cone-shaped, with its broad base directed upward and to the right, while the apex points downward and to the left. Approximately two-thirds of the heart lies to the left of the body's midline. It is suspended within a protective membranous sac called the pericardium.324