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This document has three purposes. First, it provides information about the heart's function and structure along with information about some arrhythmias using interactive visualization techniques.
There are 2 basic types of cardiac cell (Myocytes) Myocardial cells. contractile respond to an electrical impulse and contract. Specialised cells. the conduction system generates electrical impulses and transmits them through the myocardium. Site of electrical impulse generation.
The heart has a middle muscular layer, the myocardium, made up of cardiac muscle cells, and an inner lining called the endocardium. The inside of the heart (heart cavity) is divided into four chambers – two atria and two ventricles – separated by car-diac valves that regulate the passage of blood.
The primary function of the heart is to pump blood through the arteries, capillaries, and veins. There are an estimated 60,000 miles of vessels throughout an adult body. Blood transports oxygen, nutrients, disease causing viruses, bacteria, hormones and has other important functions as well. The heart is the pump that keeps blood circulating ...
1.1.1 Overview. This chapter outlines the anatomy, physiology, and pathophysiology of the heart, linking the micro- and macroscopic structure of cardiac muscle fiber to its function during contraction and relaxation. The properties of cardiac muscle cells and the process of contraction at a cellular level are also described.
How Your Heart Works. Your heart is a muscular pump about the size of your fist, located slightly to the left and behind your breastbone. Its function is to pump blood throughout your body. As your heart beats, the walls of the heart squeeze, sending nearly 12 pints of blood throughout your body every minute.
The primary functions of the cardiovascular system include: Supplying oxygen and nutrients to all tissues and organs. Providing communication between endocrine glands and their target organs.
