Satellite cells are a type of stem cell found in skeletal muscle tissue. They play a crucial role in muscle growth, repair, and regeneration. When muscle fibers are damaged, satellite cells become activated, proliferate, and can either fuse with existing muscle fibers to help repair them or form new muscle fibers. These cells are located between the muscle fiber membrane and the surrounding basement membrane. They remain in a quiescent state until needed, making them essential for maintaining muscle health and function. Their activity is particularly important during exercise, injury recovery, and muscle adaptation.