Medical
The human heart is a vital muscular organ located in the mediastinum of the thoracic cavity, slightly left of the midline. Protected by the pericardium, its primary function is to pump blood throughout the circulatory system via rhythmic contractions.
Structurally, the heart features four distinct chambers: two superior atria and two inferior ventricles. The right side manages deoxygenated blood, directing it to the lungs for oxygenation via the pulmonary artery. The left side receives oxygen-rich blood, distributing it systematically through the aorta. Four cardiac valves ensure strict unidirectional flow, preventing regurgitation during the cardiac cycle.