Urogenital development and sexual differentiation in males of the species Dasyprocta fuliginosa.

Autor: Freire ECB; Institute of Health and Animal Production (ISPA), Federal Rural University of the Amazon (UFRA), Belém, Brazil., Branco É; Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Federal Rural University of the Amazon (UFRA), Belém, Brazil., Giese EG; Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Federal Rural University of the Amazon (UFRA), Belém, Brazil., Monteiro FOB; Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Federal Rural University of the Amazon (UFRA), Belém, Brazil., Mayor P; Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Federal Rural University of the Amazon (UFRA), Belém, Brazil.; Departament de Sanitat i d'Anatomia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain.; Museo de Culturas Indígenas Amazónicas, Iquitos, Peru.; ComFauna, Comunidad de Manejo de Fauna Silvestre en la Amazonía y en Latinoamérica, Iquitos, Peru.; Rede de Pesquisa em Diversidade, Conservação e Uso da Fauna na Amazônia (REDEFAUNA), Manaus, Brazil., de Lima AR; Postgraduate Program in Animal Health and Production in Amazonia (PPGSPAA), Federal Rural University of the Amazon (UFRA), Belém, Brazil.
Jazyk: angličtina
Zdroj: Anatomia, histologia, embryologia [Anat Histol Embryol] 2023 Nov; Vol. 52 (6), pp. 956-966. Date of Electronic Publication: 2023 Aug 22.
DOI: 10.1111/ahe.12955
Abstrakt: Thirteen black agouti (Dasyprocta fuliginosa) male fetuses, acquired in two areas of the Amazon Forest, were used for the purpose of morphologically describing the fetal male urogenital organs with a focus on addressing histological and macroscopic aspects. The organs of interest were dissected and photographed in situ and ex situ. Fragments were collected and subjected to routine histological processing for inclusion in paraffin, which was cut and stained by haematoxylin and eosin and Gomori's Trichrome methods and subsequently analysed in a light microscope. The results showed that the urinary tract is like that of domestic animals and is composed of smooth unilobed kidneys covered by a dense capsule of connective tissue and divided into two well-defined regions, cortical and medullary. Ureters, urethra and urinary bladder also showed macroscopic and microscopic characteristics similar to those of domestic animals. The penis of these animals has fibroelastic characteristics, with numerous keratinized structures at its apex. In the middle third of the penis, a "U" shaped penile flexure was seen; the glans penis is covered by a keratinized epidermis containing horny spicules. The presence of a penile bone in an endochondral ossification process was observed, being more developed in gestational ages greater than 76 days. The annex glands were not observed, probably because they were fetuses; only the ampulla of the ductus deferens was identified.
(© 2023 Wiley-VCH GmbH. Published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje