The development of the sphincter muscle in the iris of the albino rat.
D000818:Animals; D000831:Animals, Newborn; D001485:Basement Membrane; D002454:Cell Differentiation; D002467:Cell Nucleus; D004847:Epithelial Cells; D005260:Female; D005333:Fetus; D005865:Gestational Age; D007498:Iris / Q000166:cytology / Q000196:embryology / Q000254:growth & development*; D008297:Male; D008544:Melanocytes / Q000166:cytology; D008854:Microscopy, Electron; D008928:Mitochondria; D024510:Muscle Development; D009130:Muscle, Smooth / Q000166:cytology / Q000196:embryology / Q000254:growth & development*; D009210:Myofibrils; D011680:Pupil; D051381:Rats