cardiac pacemaker,SA node,sinoatrial node,pacemaker- a specialized bit of heart tissue that controls the heartbeat papillary muscle- any of several muscles associated with the atrioventricular valves; "the papillary muscles contract during systole to prevent regurgitation of blood into the atria" ...
The meaning of CARDIAC MUSCLE is the principal involuntary-muscle tissue of the vertebrate heart made up of striated fibers joined at usually branched ends and functioning in synchronized rhythmic contraction.
The meaning of CARDIAC is of, relating to, situated near, or acting on the heart. How to use cardiac in a sentence.
Cardiac muscle, in vertebrates, one of three major muscle types, found only in the heart. Cardiac muscle possesses contractile units known as sarcomeres and exhibits rhythmic contractions. The rhythmic contractions are regulated by the sinoatrial node of
a junctional complex that is referred to as the intercalated disc. The cardiac muscle cells are not fused together into multinucleate structures just as in skeletal muscle cells. The cardiac muscle is also referred to as the myocardium. In particular, the myocardium is the muscle tissue of the...
muscle Tissue that shortens to make part of the body move. Most striated muscle is voluntary (under conscious control). Smooth muscle is involuntary (under automatic control). See cardiac muscle, skeletal muscle, smooth muscle, striated muscle. Dictionary of Unfamiliar Words by Diagram Group Copyrig...
Cardiac muscles (the muscles of the heart) are the third kind; they are involuntary and consist of striated fibers different from those of voluntary muscle. The contraction and relaxation of cardiac muscle continues at a rhythmic pace until death unless the muscle is injured in some way. ...
Skeletal muscle:Along with smooth and cardiac muscle, one of the types of muscle tissue in the body.Skeletal musclerepresents the majority of muscle tissue. It is the type of muscle that powers movement of the skeleton, as in walking and lifting. ...
muscle corpuscles . The nonstriated muscles areinvoluntary. They constitute a large part of the walls of the alimentary canal, blood vessels, uterus, and bladder, and are found also in the iris, skin, etc. They are made up of greatly elongated cells, usually grouped in bundles or sheets....
Sudden Cardiac Arrest A heart attack can cause other abnormalities besides blocking blood flow. For example, sudden cardiac death may occur when the heart's electrical signals become erratic (arrhythmias). When the heart tissue that is responsible for regular electrical stimulus of heart muscle contra...