Morphology and biometry of the apical ligament of the penis of Girolando race bulls/Morfologia e biometria do ligamento apical do penis de touros da raca Girolando

• Published in: Ciência rural 2010-08, Vol.40 (8), p.1759
• Main Authors: Cardoso, Julio Roquete, Eurides, Duvaldo, Moreira, Paulo Cesar, Mendonca, Alberto Correa, da Silva, Luiz Antonio Franco, Carneiro, Frederico Ozanam Silva, Cruz, Viviane Souza
• Format: Article
• Language: Spanish
• Subjects: Biometry
• ISSN: 0103-8478

The aim of this study was to describe the morphology and biometry of the apical ligament of the penis of Girolando bulls. For this purpose, it was dissected 32 penis of Girolando bulls obtained from slaughterhouses and kept frozen until their dissection. The animals were 36 to 48 month old and weighted between 480 and 540kg. The origin of the apical ligament occurred at 15.1±2.9cm distally to the caudal loop of the sigmoid flexure and its insertion occurred at 1.4±0.7cm proximally to the neck of the glans. The length of the apical ligament was 19.9±2.6cm. The width was 1.9±0.6mm at its origin, 2.2±0.8mm at its insertion and 35.2±10mm at the insertion of the internal lamina of prepuce. The average thickness along its extension varied from 0.7 to 1.0mm. On the free portion of the penis the apical ligament involved predominantly the dorsum and the left side of the penis, and its attachment to the tunica albuginea varied along its extension. The apical ligament is firmly attached to the tunica albuginea on its origin, insertion and on the left side of the penis, but dorsally and on the right side of the penis this union is made only through loose connective tissue. Significant linear relation was observed between length and circumference of the penis with length of the apical ligament, but the relation between these penis parameters and the width of the apical ligament was low. Key words: anatomy, biometry, bovine, genital. Objetivou-se descrever a morfologia e biometria do ligamento apical do penis de 32 touros da raca Girolando (Bos taurus indicus X Bos taurus taurus, Linnaeus - 1758), com idade de 36 a 48 meses e pesando de 480 a 540kg. As pecas anatomicas foram obtidas em frigorifico e mantidas congeladas ate dissecacao. O ligamento originou-se a 15,1±2,9cm distalmente a curvatura caudal da flexura sigmoide e inseriu-se a 1,4±0,7cm proximalmente ao colo da glande, medindo 18,9±2,6cm de comprimento. Apresentou largura de 1,9±0,6mm na sua origem, 2,2±0,8mm na insercao e 35,2±10mm na altura da insercao da lamina interna do prepucio. A espessura media ao longo de sua extensao variou de 0,7 a 1,9mm. Proximo a coroa da glande, o ligamento apical se posiciona principalmente na superficie dorsolateral esquerda desse orgao, e a caracteristica da sua fixacao na albuginea apresentou variacoes ao longo de sua extensao. Em sua origem e insercao e na face esquerda do penis, o ligamento apical e firmemente aderido a tunica albuginea, mas na face dorsal e direita do penis