Cardiac Muscle Definition Function Structure Britannica

Cardiac Muscle Definition Function Structure Britannica Cardiac muscle differs from skeletal muscle in that it exhibits rhythmic contractions and is not under voluntary control. the rhythmic contraction of cardiac muscle is regulated by the sinoatrial node of the heart, which serves as the heart’s pacemaker. the heart consists mostly of cardiac muscle cells (or myocardium). Heart, organ that serves as a pump to circulate the blood. it may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one or more receiving chambers (atria) and a main pumping chamber (ventricle), as in mollusks. in fishes the heart is a folded tube, with three or four enlarged areas that correspond.

Cardiac Muscle Definition Function Structure Britannica These inner and outer layers of the heart, respectively, surround the cardiac muscle tissue and separate it from the blood and other organs. cardiac muscle is made from sheets of cardiac muscle cells. these cells, unlike skeletal muscle cells, are typically unicellular and connect to one another through special intercalated discs. In humans the muscle systems are classified by gross appearance and location of cells. the three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated). striated muscle is almost exclusively attached to the skeleton and constitutes the bulk of the body’s muscle tissue. the multinucleated fibres are under the control. Introduction. cardiac muscle also called the myocardium, is one of three major categories of muscles found within the human body, along with smooth muscle and skeletal muscle. cardiac muscle, like skeletal muscle, is made up of sarcomeres that allow for contractility. however, unlike skeletal muscle, cardiac muscle is under involuntary control. Cardiac muscle (or myocardium) makes up the thick middle layer of the heart. it is one of three types of muscle in the body, along with skeletal and smooth muscle. the myocardium is surrounded by a thin outer layer called the epicardium (aka visceral pericardium) and an inner endocardium. coronary arteries supply to the cardiac muscle, and cardiac veins drain this blood. cardiomyocytes are the.