GENERAL HISTOLOGY

Detailed explanation-1: -Myoblasts are the embryonic precursors of myocytes (also called muscle cells). Myoblasts differentiate into muscle cells through a process called myogenesis. During myogenesis, the myoblasts fuse into multi-nucleated myotubes, which later become the muscle fibers.

Detailed explanation-2: -Development. A myoblast is an embryonic precursor cell that differentiates to give rise to the different muscle cell types. Differentiation is regulated by myogenic regulatory factors, including MyoD, Myf5, myogenin, and MRF4. GATA4 and GATA6 also play a role in myocyte differentiation.

Detailed explanation-3: -During later steps of development, myoblasts fuse with existing myotubes promoting muscle growth. Upon injury, satellite cells are activated and asymmetrically divide generating a new pool of myoblasts. These myoblasts once again fuse with each other and to injured myotubes to promote muscle regeneration.

Detailed explanation-4: -Muscles. Muscles are derived from myoblasts that differentiate from mesoderm at approximately 5 weeks of gestation and fuse to form myotubes at approximately 7 weeks of gestation.