The sarcoplasmic reticulum and development of Z lines in skeletal muscle fibers of fetal and postnatal rats.
D000818:Animals; D000831:Animals, Newborn; D004721:Endoplasmic Reticulum / Q000254:growth & development; D005333:Fetus; D006614:Hindlimb; D008854:Microscopy, Electron; D024510:Muscle Development; D009132:Muscles / Q000166:cytology / Q000196:embryology; D009210:Myofibrils; D051381:Rats; D013194:Staining and Labeling