Abstract:ABSTRACT. The study of the female genital system of Colt/mba /ivia (Gmelin, 1789) is part of the research on the reproductive biology of Brazilian birds. This work describes the morphological aspects of the ovary of Coillmba livia, as well as the histological differences observed in the ovarian follicles during the ovocyte maturation process. Ten Coillmba Jivia females were studied, whose ovaries had been dissected, fixed in Bouin and Helly solutions, and histologically processed for staining (Hematoxylin-Eosi… Show more
“…The medulla was comprised of loose connective tissue, smooth muscles and large number of blood vessels, fibers, lymph vessels and lacunar channels as reported earlier by Ribeiro [18] in pigeon. With advancing age, these lacunar channels increased and became wider as reported earlier by Gonzalez Moran [19] in chicken.…”
Section: Medullasupporting
confidence: 57%
“…At 8 weeks of age, there was clear cut demarcation between cortex and medulla ( Figure 1). Similarly, Ribeiro [18] reported that before the gonadal maturation, there were two distinct regions in the ovary: the cortex, a peripheral region where the follicles were found and the medulla region, more central and made of loose connective tissue intensely vascularized and presenting nervous fibers and some smooth muscular fibers in pigeon. At 16 weeks, cortex started to interact with sub cortical medulla (Figure 2).…”
Section: Cortex and Medullamentioning
confidence: 88%
“…At 24 weeks and 30 weeks, tunica albuginea was not found (Figure 16). Similarly, Ribeiro [18] reported in pigeon that the tunica albuginea got slimmer and the cortical and medulla regions were not distinguished as the gonadal maturation started. …”
The present study was undertaken to elucidate histomorphological and histochemical studies on ovaries of Punjab white quail. The birds were divided into four age groups 8weeks, 16weeks, 24weeks and 30weeks. The study revealed that entire ovary was covered by single layer of squamous to cuboidal epithelium depended on the presence or absence of follicles. The cortex was separated from medulla by a thin layer of connective tissue called tunica albuginea at 8 weeks of age. The tunica albuginea was composed of abundance of collagen fibers with few reticular and elastic fibers. This layer started regress at 16 weeks and was completely diminished at 24 weeks and 30 weeks of age. The medulla was comprised of loose connective tissue and large number of blood vessels, lymph vessels and lacunars channels. With advancing age, these lacunars channels increased in number. Smooth muscle fibers along with nerve fibers were also seen. Micrometrical data showed that the mean height of the epithelium increased with the age but was maximum at 24 weeks of age whereas thickness of the cortex and medulla was maximum at 16 and 8 weeks of age. Histochemical studies revealed that PAS reaction was strong in the surface epithelium, moderate in the cortex and medulla. Acid mucoploysaccharides were strong in the surface epithelium, moderate in cortex and theca layers, weak in medulla. Surface epithelium showed strong to intense reaction for basic proteins. Sudanophillic lipids were weak in the epithelium, cortex and medulla.
“…The medulla was comprised of loose connective tissue, smooth muscles and large number of blood vessels, fibers, lymph vessels and lacunar channels as reported earlier by Ribeiro [18] in pigeon. With advancing age, these lacunar channels increased and became wider as reported earlier by Gonzalez Moran [19] in chicken.…”
Section: Medullasupporting
confidence: 57%
“…At 8 weeks of age, there was clear cut demarcation between cortex and medulla ( Figure 1). Similarly, Ribeiro [18] reported that before the gonadal maturation, there were two distinct regions in the ovary: the cortex, a peripheral region where the follicles were found and the medulla region, more central and made of loose connective tissue intensely vascularized and presenting nervous fibers and some smooth muscular fibers in pigeon. At 16 weeks, cortex started to interact with sub cortical medulla (Figure 2).…”
Section: Cortex and Medullamentioning
confidence: 88%
“…At 24 weeks and 30 weeks, tunica albuginea was not found (Figure 16). Similarly, Ribeiro [18] reported in pigeon that the tunica albuginea got slimmer and the cortical and medulla regions were not distinguished as the gonadal maturation started. …”
The present study was undertaken to elucidate histomorphological and histochemical studies on ovaries of Punjab white quail. The birds were divided into four age groups 8weeks, 16weeks, 24weeks and 30weeks. The study revealed that entire ovary was covered by single layer of squamous to cuboidal epithelium depended on the presence or absence of follicles. The cortex was separated from medulla by a thin layer of connective tissue called tunica albuginea at 8 weeks of age. The tunica albuginea was composed of abundance of collagen fibers with few reticular and elastic fibers. This layer started regress at 16 weeks and was completely diminished at 24 weeks and 30 weeks of age. The medulla was comprised of loose connective tissue and large number of blood vessels, lymph vessels and lacunars channels. With advancing age, these lacunars channels increased in number. Smooth muscle fibers along with nerve fibers were also seen. Micrometrical data showed that the mean height of the epithelium increased with the age but was maximum at 24 weeks of age whereas thickness of the cortex and medulla was maximum at 16 and 8 weeks of age. Histochemical studies revealed that PAS reaction was strong in the surface epithelium, moderate in the cortex and medulla. Acid mucoploysaccharides were strong in the surface epithelium, moderate in cortex and theca layers, weak in medulla. Surface epithelium showed strong to intense reaction for basic proteins. Sudanophillic lipids were weak in the epithelium, cortex and medulla.
“…A espécie Columba livia, em específico, é bastante encontrada em países da América do Sul, tais como Brasil, Bolívia, Chile e Peru (RIBEIRO et al, 1995).…”
Section: Introductionunclassified
“…O estudo dos pombos é importante por diversos aspectos: 1) ecológicos, por serem aves onívoras que habitam diversos ambientes, inclusive grandes cidades; 2) sociais, por entupirem calhas, apodrecerem forros de madeira e causarem danos a monumentos históricos e pinturas de carros; 3) epidemiológicos, por alojarem parasitas e transmitirem doenças como Toxoplasmose, Criptococose, Ornitose, Histoplasmose e Salmonelose, além de dermatites (RIBEIRO et al, 1995).…”
ResumoEste estudo objetivou definir a origem e a distribuição da artéria celíaca e de seus ramos colaterais em 15 aves da espécie Columba livia, cedidas pelo Centro de Controle de Zoonoses de Brasília. Com a finalidade de marcar o sistema arterial dos espécimes, o tronco braquiocefálico esquerdo foi canulado e injetado com solução aquosa de látex corado. Posteriormente, procedeu-se à fixação das aves com solução aquosa de formol 10% v/v e a dissecação com instrumentos adequados, obtendo-se os resultados descritos neste artigo. A artéria celíaca originou-se da face ventral da aorta descendente. O primeiro ramo colateral surgiu da própria artéria celíaca, constituindo a artéria esofágica. Posteriormente, a artéria celíaca se bifurcou em dois ramos, denominados ramo esquerdo e ramo direito da artéria celíaca. O ramo esquerdo emitiu a artéria proventricular ventral, seguida das artérias esplênicas, da artéria proventricular dorsal e da artéria hepática esquerda. O ramo esquerdo se bifurcou, originando as artérias gástricas, ventral e esquerda. O ramo direito emitiu a artéria hepática direita, seguida da artéria ileal e da artéria gástrica direita. Por fim, o ramo direito prosseguiu como artéria pancreaticoduodenal. Os achados deste trabalho apresentaram grande similaridade com as linhagens de aves da espécie Gallus gallus, exceto pela ausência da artéria ileocecal, de ramos císticos e da artéria gástrica dorsal.Palavras-chave: Artéria celíaca; Columba lívia; Distribuição; Origem; Pombo doméstico
AbstractDescription of the celiac artery in domestic pigeons (Columba livia). This paper aimed to define the origin and distribution of the celiac artery and its collateral branches in 15 fowls from the Columba livia species, which were obtained from the Zoonosis Control Center of Brasilia, Brazil. In order to mark the arterial
The sex of neonatal sea turtles is difficult to determine, because neonates lack heteromorphic sex chromosomes and dimorphic external characteristics; internal dimorphic morphology is defined at hatching. We used histochemical staining and made measurements in the gonads and paramesonephric ducts (PD) of both sexes to determine structural differences in female and male loggerhead sea turtle (Caretta caretta) hatchlings. We detected differences in the gonads and PD between the sexes including the amounts of mucopolysaccharides, collagen and elastic fibers. We determined that the thickness of the gonadal cortex and the diameter of the PD lumen are reliable sex-specific characteristics. We also assessed immunolocalization of aromatase, an enzyme complex that converts androgens to estrogens, and found differences in the localization and intensity of aromatase immunostaining in the gonads and PD of female and male hatchlings. Comprehensive studies of the sexual differences of sea turtles are important for conservation programs.
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