Definition A muscle fiber (also: muscle fiber cell, myocyte) is the smallest unit of a skeletal muscle; the muscle cells of the smooth muscle and the heart muscle show certain similarities to the muscle fibers, but are not called so. Structure of a muscle fiber A muscle fiber is a so-called syncytium. This means that … Muscle Fiber
Composition In total, a muscle fiber consists of about three-quarters water, 20% protein (half of which is provided by the contractile proteins actin and myosin) and 5% ions, fats, glycogen (an energy store) and nitrogenous substances. Types of muscle fibers Two different types of muscle fibers are distinguished by their function. On the one hand … Composition | Muscle Fiber
