The heart is a muscular organ; this is the size of a closed fist. The responsibility of the heart is the pumping of blood through the blood vessels through recurrent rhythmic contractions. The heart consists of cardiac muscle, involuntary muscle tissue. The term "cardiac" means "heart-related", that is, a four-chamber double pump and is located in the thoracic cavity between the lungs, with the heart muscle being a conduction system of its own, which contrasts with Skeletal muscle Needs conscious or reflexive nervous stimuli. Rhythmic contractions of the heart occur instinctively, although the heart rhythm may be altered by nervous or hormonal influence such as exercise or perception of danger.
- Track 1-1 Myocardial Contractility
- Track 2-2 Cardiotonic agents
- Track 3-3 Cardiac anatomy and physiology
- Track 4-4 Antihypotensive agents