The skeletal muscles are very short, as can be seen, with a maximum of one nucleus per cell. In the above images, the purple spots are the nuclei, and the pink is obviously the muscle. Smooth Smooth muscle is exclusively involuntary. Muscle tissue is composed of long and excitable cells that have the capability of contraction. The micro-filaments actin and myosin are parallel within the cytoplasm, creating a striated look to the muscle tissue.
Muscle is the most abundant tissue in animals, accounting for almost two-thirds of the bulk.
The three types of muscle tissue are cardiac, skeletal, and visceral. Attached by tendons, skeletal muscle is responsible for most voluntary movements of the body. Skeletal muscle is called striated, because it has a striped apearance from overlaping filaments. Cardiac muscle makes up the contractile wall of the heart it is striated and branched. The ends of the cells are attached to intercalculated discs, that relay the contract signal from the individual cells during a heart beat.