myofibril definition: The contractile element of skeletal and cardiac muscle; a long, highly organized bundle of actin, myosin, and other proteins that contracts by a sliding filament mechanism. [ISBN:0815316194]
Skeletal Muscle Tissue definition: Striated muscles that are under voluntary control of the organism. They are connected at either or both ends to a bone and are utilized for locomotion and other movements.
striated muscle thick filament definition: Bipolar filaments formed of polymers of a muscle-specific myosin II isoform, found in the middle of sarcomeres in myofibrils. [GOC:mtg_muscle, ISBN:0815316194]
striated muscle thin filament definition: Filaments formed of actin and associated proteins; attached to Z discs at either end of sarcomeres in myofibrils. [ISBN:0815316194]
smooth muscle definition: nonstriated involuntary muscle; one of the muscles of the internal organs, blood vessels, hair follicles, etc; contractile elements are elongated, usually spindle-shaped cells with centrally located nuclei.
Smooth muscle tissue definition: Tissue which consists of smooth muscle fibers surrounded by a reticulum of collagen and elastic fibers. Examples: Arrector muscle of hair, Muscularis mucosae.
Smooth Muscle Tissue definition: Involuntary muscle tissue of the internal organs. It is composed of elongated muscle cells or fibers that are not arranged in a striated pattern and formlayers of muscle tissue. The smooth muscle cells contain a contractile apparatus composed of thin and thick filaments and a cytoskeleton composed of intermediate filaments.
striated muscle definition: muscle with fibers divided by transverse bands into striations; in general under voluntary control.
Muscle, Striated definition: One of twotypes of muscle in the body, characterized by the array of bands observed under microscope. Striated muscles can be divided into two subtypes: the CARDIAC MUSCLE and the SKELETAL MUSCLE.
Striated muscle tissue definition: Tissue which consists of striated muscle fibers surrounded by endomysium. Examples: Skeletal muscle tissue, Cardiac muscle tissue.
Striated Muscle Tissue definition: Striated muscles are appendicular and axial muscles typically connected at either or both ends to the bony skeleton of the body. Striated muscle fibers contain a highly organized, contractile cytoskeletal apparatus with a striated microscopicappearance; muscle contraction is typically under voluntary control.
Striated muscle cell definition: Muscle cell which has as its direct parts myofilaments organized into sarcomeres.
Visceral Striated Muscle Tissue definition: Muscle tissue associated with organs such as tongue, pharynx, diaphragm and upperpart of the esophagus. It is identical in structure to skeletal muscle tissue.
regulation of striated muscle development definition: Any process that modulates the frequency, rate or extent of striated muscle development. [GOC:go_curators]
striated muscle cell differentiation definition: The process whereby a relativelyunspecialized cell acquires specialized features of a striated muscle cell; striated muscle fibers are divided by transverse bands into striations, and cardiac and voluntary muscle are types of striated muscle. [CL:0000737, GOC:ai]
striated muscle cell development definition: The process whose specific outcome is the progression of a striated muscle cell overtime, from its formation to the mature structure. Striated muscle cells contain fibers that are divided by transverse bands into striations, and cardiac and skeletal muscle are types of striated muscle. [CL:0000737, GOC:devbiol]
striated muscle development definition: The process whose specific outcome is the progression of a striated muscle over time, from its formation to the mature structure. Striated muscle contain fibers that are divided by transverse bands into striations, and cardiac and skeletal muscle are types of striated muscle. Skeletal muscle myoblasts fuse to form myotubes and eventually multinucleated muscle fibers. The fusion of cardiac cells is veryrare and can only form binucleate cells. [CL:0000737, GOC:mtg_muscle]
striated muscle cell proliferation definition: The multiplication or reproduction of striated muscle cells, resulting in the expansion of a cell population. Striated muscles contain fibers that are divided by transverse bands into striations, and cardiac and skeletal muscle are types of striated muscle. [CL:0000737, GOC:ef, GOC:mtg_muscle]
striated muscle cell apoptosis definition: A form of programmed cell deathinduced by external or internal signals that trigger the activity of proteolyticcaspases, whose actionsdismantle a striated muscle cell and result in its death. Striated muscle cells make up striated muscle fibers which are divided by transverse bands into striations. [GOC:dph, GOC:tb]