Cardiovascular System | Zoology

This Master Class is for zoology students.

This class is all about physiology of human heart. 
students need to bring a notebook and a pen to class .

The cardiovascular system is sometimes called the blood-vascular, or simply the circulatory, system. It consists of the heart, which is a muscular pumping device, and a closed system of vessels called arteries, veins, and capillaries.

The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart.

The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.The shape of the heart is similar to a triangle, rather broad at the superior surface and tapering to the apex (see Figure). A typical heart is approximately the size of your fist. Given the size difference between most members of the sexes, the weight of a female heart is smaller on average than the male's heart.