[Relationships between cellular density and differentiation in muscle fibers in vitro].
D000818:Animals; D000831:Animals, Newborn; D002452:Cell Count; D002454:Cell Differentiation; D002455:Cell Division; D002459:Cell Fusion; D002642:Chick Embryo; D066298:In Vitro Techniques; D009132:Muscles / Q000166:cytology*; D051381:Rats