Fig. 9From: Microanatomy of the female reproductive system of the viviparous freshwater whipray Fluvitrygon signifer (Chondrichthyes: Myliobatiformes: Dasyatidae). II. The genital ductUterine microscopic structures of F4 and F5 females of Fluvitrygon signifer. Uterus of F4 and F5 females having the thickest uterine wall (a), uterine epithelium atop numerous blood vessels (b) and trophonemata (Tm) with a thin epithelium overlying blood vessels (c). Micrographs are designated with their corresponding specimen codes. Abbreviations: Ad, adventitia; CM, circular smooth muscle; Co, columnar cell; Lc, leukocyte; LM, longitudinal smooth muscle; LP, lamina propria; *, blood vessel. Stains: a = modified Movat’s pentachrome; b = H&E; c = PAS–HBack to article page