The heart cavity is divided down the middle into a right and a left heart, which in turn are subdivided into two chambers. The upper chamber is called an atrium (or auricle), and the lower chamber is called a ventricle. In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest, called the mediastinum. [4] The human heart is a complex organ featuring an intricate network of blood vessels, chambers, and supporting structures that work together to maintain circulation throughout the body. This detailed anatomical illustration showcases the heart 's major vessels, arteries, and veins, along with its essential structural components, providing a comprehensive view of cardiac anatomy from an anterior perspective. In an adult, the heart is approximately equal to the size of a clenched fist. The broader base lies upward slightly towards the right side part of the sternum, while the significant portion of the pointed apex lies slightly left to the sternum facing the diaphragm.
