What Is the Term for a Rhythmic Contraction of a Muscle

Heart muscle cells form a highly branched cellular network in the heart. They are connected from one end to the other by intervertebral discs intercalated and organized into layers of myocardial tissue wrapped around the chambers of the heart. The contraction of the individual cells of the heart muscle creates strength and shortening in these muscle ligaments, which leads to a decrease in the size of the ventricle and the resulting expulsion of blood into the lungs and vessels of the system. The important components of each heart muscle cell involved in the processes of excitation and metabolic recovery are the plasma membrane and transverse tubules in Z-line recording, the sarcoplasmic longitudinal reticulum and terminal cisterns, as well as mitochondria. Thick (myosin) and thin (actin, troponin and tropomyosin) protein filaments are arranged in contractile units, with the sarcomere extending from the Z line to the Z line, which have a characteristic striated pattern similar to that of skeletal muscles. Peristalsis is a series of wave muscle contractions that move food through the digestive tract. It begins in the esophagus, where strong undulating movements of smooth muscles move the balls of swallowed food into the stomach. There, the food is stirred in a liquid mixture called porridge, which moves into the small intestine, where peristalsis persists. Heart muscle, also called myocardium, in vertebrates, one of the three main types of muscles found only in the heart. Heart muscle is similar to skeletal muscle, another important type of muscle, in that it has contractile units known as sarcomeres; However, this feature also distinguishes it from smooth muscle, the third type of muscle.

Heart muscle differs from skeletal muscle in that it has rhythmic contractions and is not under voluntary control. The rhythmic contraction of the heart muscle is regulated by the sinus node of the heart, which serves as a pacemaker. The rate at which the heart contracts and the timing of atrial and ventricular contraction necessary for efficient blood pumping depends on the electrical properties of heart muscle cells and the conduction of electrical information from one region of the heart to another. The action potential (muscle activation) is divided into five phases. Each of the phases of the action potential is caused by time-dependent changes in plasma membrane permeability for potassium ions (K+), sodium ions (Na+) and calcium ions (Ca2+). The heart consists mainly of heart muscle (or myocardium) cells. The remarkable features of the action of the heart are its contractility, which is the basis of its pumping effect, and the rhythmicity of contraction. The amount of blood pumped from the heart per minute (cardiac output) varies to meet the metabolic needs of peripheral tissues, especially skeletal muscle, kidneys, brain, skin, liver, heart, and gastrointestinal tract. Cardiac output is determined by the contractile strength developed by the heart muscle cells, as well as how often they are activated (rhythm). Factors that affect the frequency and strength of heart muscle contraction are critical to determining the heart`s normal pumping performance and response to changes in demand. Stretching a piece of intestine makes it easier to see the wave movement.

The movement mixes and moves the porridge back and forth. This allows the bloodstream to absorb nutrients through the walls of the small intestine. In the large intestine, peristalsis helps to absorb water from undigested food into the bloodstream. Then the remaining waste is excreted through the rectum and anus. A.D.A.M., Inc. is accredited by URAC for Health Content Providers (www.urac.org). URAC`s accreditation program is an independent audit to verify that a.D.A.M. adheres to strict standards of quality and responsibility. A.D.A.M. is among the first to receive this important award for eHealth information and services. Learn more about A.D.A.M.A.A.`s editorial process and privacy policy.M.

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