[Sex dimorphism of quantitative parameters of the masticatory muscles and skull of the rabbit].

The dry weight of the muscles of mastication and the size of the skull in the rabbit were studied from the 45th to the 225th d of life. Sexual dimorphism in the dry weight of the muscles of mastication appeared after the 100th d, the weight being higher in the case of the males. Sexual dimorphism of the skull affected only the zygomatic arch, the dimensions of the zygomatic arch in the male being greater than in the female from the 120th d on. The 2 differences are considered in relation to each other.