[Ultrastructure of the interstitial cells of the 18-day-old chick embryo testicle].
D000818:Animals; D002642:Chick Embryo; D005260:Female; D006801:Humans; D056885:Interstitial Cells of Cajal; D007985:Leydig Cells; D008297:Male; D006080:Ovarian Follicle; D013737:Testis / Q000196:embryology*
TESTIS/embryology