Skeletal muscle is a vital motor organ composed of multinucleated myofibers, which are formed through complex processes including cell differentiation, cell-cell fusion, myonuclei migration, and myofibril crosslinking. These processes collectively define myogenesis, the formation and maturation of myofibers. Skeletal muscle plays a crucial role in voluntary movement, respiration, body temperature regulation, and organ protection. Its functions include muscle contraction, thermogenesis, and secretion of myokines. Skeletal muscle can respond to stimuli by undergoing atrophy, hypertrophy, or regeneration, and its dysfunction can lead to myopathies. The molecular structure of skeletal muscle involves key proteins such as myomaker and myomerger, which are essential for myofiber formation and fusion. Myomaker is a conserved plasma membrane protein involved in myofiber fusion, while myomerger facilitates the fusion process. These proteins are regulated by transcription factors such as MyoD and MyoG, as well as miRNAs. The expression and function of these proteins are crucial for maintaining normal muscle development and function. Myogenesis occurs in several phases, including embryonic, fetal, neonatal, and adult. During myogenesis, myoblasts fuse to form multinucleated myofibers, and myonuclei migrate to the plasma membrane for optimal function. Myonuclei localization is essential for maintaining muscle function and is regulated by various proteins and signaling pathways. Myonuclei migration and dispersion are critical for the proper distribution and function of myonuclei within myofibers. Skeletal muscle also has important metabolic functions, including energy production through ATP metabolism, glucose uptake and storage, and thermogenesis. These functions are regulated by various enzymes and signaling pathways, and they are essential for maintaining muscle function and overall body homeostasis. Skeletal muscle dysfunction can lead to various myopathies, and understanding the molecular mechanisms underlying myogenesis and muscle function is crucial for developing therapeutic strategies for muscle diseases.Skeletal muscle is a vital motor organ composed of multinucleated myofibers, which are formed through complex processes including cell differentiation, cell-cell fusion, myonuclei migration, and myofibril crosslinking. These processes collectively define myogenesis, the formation and maturation of myofibers. Skeletal muscle plays a crucial role in voluntary movement, respiration, body temperature regulation, and organ protection. Its functions include muscle contraction, thermogenesis, and secretion of myokines. Skeletal muscle can respond to stimuli by undergoing atrophy, hypertrophy, or regeneration, and its dysfunction can lead to myopathies. The molecular structure of skeletal muscle involves key proteins such as myomaker and myomerger, which are essential for myofiber formation and fusion. Myomaker is a conserved plasma membrane protein involved in myofiber fusion, while myomerger facilitates the fusion process. These proteins are regulated by transcription factors such as MyoD and MyoG, as well as miRNAs. The expression and function of these proteins are crucial for maintaining normal muscle development and function. Myogenesis occurs in several phases, including embryonic, fetal, neonatal, and adult. During myogenesis, myoblasts fuse to form multinucleated myofibers, and myonuclei migrate to the plasma membrane for optimal function. Myonuclei localization is essential for maintaining muscle function and is regulated by various proteins and signaling pathways. Myonuclei migration and dispersion are critical for the proper distribution and function of myonuclei within myofibers. Skeletal muscle also has important metabolic functions, including energy production through ATP metabolism, glucose uptake and storage, and thermogenesis. These functions are regulated by various enzymes and signaling pathways, and they are essential for maintaining muscle function and overall body homeostasis. Skeletal muscle dysfunction can lead to various myopathies, and understanding the molecular mechanisms underlying myogenesis and muscle function is crucial for developing therapeutic strategies for muscle diseases.