File Name: microscope anatomy and organization of skeletal muscle 11 .zip
Metrics details. In skeletal muscle, the excitation-contraction EC coupling machinery mediates the translation of the action potential transmitted by the nerve into intracellular calcium release and muscle contraction.
Cardiac muscle tissue, or myocardium, is a specialized type of muscle tissue that forms the heart. This muscle tissue, which contracts and releases involuntarily, is responsible for keeping the heart pumping blood around the body. The human body contains three different kinds of muscle tissue: skeletal, smooth, and cardiac. Only cardiac muscle tissue, comprising cells called myocytes, is present in the heart. In this article, we discuss the structure and function of cardiac muscle tissue. We also cover medical conditions that can affect cardiac muscle tissue and tips for keeping it healthy. Muscle is fibrous tissue that contracts to produce movement.
Comprehensive Human Physiology pp Cite as. Motility is a widespread biological phenomenon that reaches its highest manifestation in the specialized tissue of muscle. Its particular function is vital to animal life, though it also serves vegetative functions as well. Animal functions are based upon the property of excitability and its conduction, as already described for nerve cells and their filamentous extensions see Chaps. Skeletal and heart muscles are also excitable, but their stimulation is intimately linked to a secondary response, that of contraction. Thus, skeletal muscle is the major executive arm of the nervous system, primarily in regard to motor activity. Unable to display preview.
Skeletal muscle is one of three major muscle types, the others being cardiac muscle and smooth muscle. It is a form of striated muscle tissue which is under the voluntary control of the somatic nervous system. A skeletal muscle refers to multiple bundles fascicles of cells joined together called muscle fibers. The fibers and muscles are surrounded by connective tissue layers called fasciae. Muscle fibers, or muscle cells , are formed from the fusion of developmental myoblasts in a process known as myogenesis.
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Tissues are composed of similar types of cells that work in a coordinated fashion to perform a common task, and the study of the tissue level of biological organization is histology. Four basic types of tissues are found in animals. Epithelium is a type of tissue whose main function is to cover and protect body surfaces but can also form ducts and glands or be specialized for secretion, excretion, absorption and lubrication.
Striated muscle tissue is a muscle tissue that features repeating functional units called sarcomeres. The presence of sarcomeres manifests as a series of bands visible along the muscle fibers, which is responsible for the striated appearance observed in microscopic images of this tissue. There are two types of striated muscles:. Striated muscle tissue contains T-tubules which enables the release of calcium ions from the sarcoplasmic reticulum.
The muscular system controls numerous functions, which is possible with the significant differentiation of muscle tissue morphology and ability. The muscular system is made up of muscle tissue and is responsible for functions such as maintenance of posture, locomotion and control of various circulatory systems. This includes the beating of the heart and the movement of food through the digestive system.