Heart ❤️

The heart (syn. Gk. Kardia/Cardia; L. Cor/Cordis) is a hollow muscular organ situated in the mediastinum of the thoracic cavity, enclosed in the pericardium. It is somewhat pyramidal in shape and placed obliquely behind the sternum and adjoining parts of costal cartilages so that one-third of the heart is to the right of median plane and two-third of the heart is to the left of the median plane. The heart consists of four chambers—right atrium and right ventricle, and left atrium and left ventricle. On the surface the atria are separated from the ventricles by the atrioventricular groove (also called coronary sulcus) and ventricles from each other by interventricular grooves.

Shape and Measurements Shape: Pyramidal or conical. Measurements: Length = 12 cm. Width = 9 cm. Weight = 300 g in males; 250 g in females. N.B. The heart is slightly larger than one’s own clenched fist.