The muscular system

Similarities and differences in the structure and function of the three types of muscle tissue and where they are found in the body: Skeletal – single, very long, cylindrical, multinucleated cells with very obvious striations, voluntary via nervous system controls, attach to bones for movement, slow to fast contractions
Cardiac – branching chains of cells, uninucleated, striated, involuntary, found only in the heart, slow rhythmic contractions
Smooth – single, fusiform, uninucleated, no striations, involuntary, can stretch, found mostly in walls of hollow visceral organs but not the heart, very slow contraction
The muscular system: The function of muscle tissue is to contract or shorten to cause movement, maintain posture, stabilize joints, and generate heat. The term muscular system applies specifically to the skeletal muscle
Endomysium – delicate connective tissue sheath enclosing muscle fibers
Perimysium – coarser fibrous membrane that wraps several sheathed muscle fibers to form a bundle of fibers called a fascicle
Epimysium – even tougher overcoat of connective tissue that covers many fascicles bound together to form the muscle
Tendon – strong, cords of dense fibrous tissue attaching a muscle indirectly to bones cartilages, or connective tissue coverings of each other
Aponeurosis – sheet-like bundles of fibrous or membranous sheet connecting a muscle and the part it moves
It has hundreds of muscle cells, blood vessels, nerve fibers and fascia.
Actin major component in force production. Actin, when polymerized into filaments, forms the "ladder" along which the myosin filaments "climb" to generate motion.
Myosin is a peptide that is responsible for force generation. It is composed of a globular head with both ATP and actin binding sites, and a long tail involved in its polymerization into myosin filaments
When muscle cells are stimulated, they contract and exert a force in one direction. Stimulation of muscle cells is caused by nerve