Heart

Heart

-         The heart is a muscular organ in humans and other animals, which pumps blood through the blood vessels of the circulatory system. 

-         The blood provides the body with oxygen and nutrients, as well as removing metabolic wastes. 

-         The heart is located in the middle compartment of the mediastinum in the chest.

-         In humans, other mammals and birds the heart is divided into four chambers ( upper left and right atria and lower left and right ventricles ). 

-         Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. 

-          Blood normally flows one way through the heart due to heart valves, which prevent backflow.