نتایج جستجو برای: germinal epithelium

تعداد نتایج: 53425  

آزاده شریف‌زاده, , طاهره طلایی‌خوزانی, , فریدون اول سرگلزایی, , محمدرضا عرب, ,

Background: Fumes generated during electric welding are one of air pollutants of working place in industrial companies, which can cause some clinical signs and diseases in worker, including mucosal irritation, changing of semen quality and cancer. Chronic exposure of workers with these fumes can cause reduce sperm motility and forward penetration and decrease in normal sperm count. Although a l...

Azari M, Hamidian GH

Background: Plant materials continue to play an important role in the maintenance of human health since antiquity. Phytoestrogens are naturally occurring plant substances that can either mimic or antagonize the action of endogenous estrogens. This study was conducted to investigate the effects of vitex agnus as a phytoestrogenic plants, essential oil on structure and morphology of seminiferous ...

Journal: :Development 1996
C M Smith D Lans D A Weisblat

Gastrulation in leech embryos is dominated by the epibolic movements of two tissues: germinal bands, composed of segmental precursor cells, and an overlying epithelium that is part of a provisional integument. During gastrulation, the germinal bands move over the surface of the embryo and coalesce along the prospective ventral midline. Concurrently, the epithelium spreads to cover the embryo. W...

Journal: :cell journal 0

objective: melatonin, the pineal gland hormone as a direct or indirect antioxidant and free radical scavenger, is involved in the process of both aging and age-related diseases. this study investigates the effects of melatonin on the histology of testicular seminiferous tubules in aged mice. materials and methods: twenty male, white mice, aged 16 months, that weighed 20-23 gr were equally divid...

Journal: :international journal of reproductive biomedicine 0
malek soleimani mehranjani masood hemadi

background: sodium arsenite and/ or vasectomy may cause variation in sex hormones which affect pathophysiology of reproductive organs. objective: the aim was to investigate the morphological changes in structure of testis and hormonal imbalance in bilateral vasectomised rats treated with sodium arsenite. materials and methods: four groups of rats: bilateral vasectomy + sodium arsenite, bilatera...

Mehraein F

Background: Melatonin, the pineal gland hormone as a direct or indirect antioxidant and free radical scavenger, is involved in the process of both aging and age-related diseases. This study investigates the effects of melatonin on the histology of testicular seminiferous tubules in aged mice. Materials and Methods: Twenty male, white mice, aged 16 months, that weighed 20-23 gr were equally divi...

Journal: :Integrative and comparative biology 2004
Lynne R Parenti Harry J Grier

Gonad morphology at the gross anatomical or histological levels has long been studied by fisheries biologists to identify annual reproductive cycles and length of breeding season, among other goals. Comparative surveys across vertebrate taxa have not been detailed enough, however, to describe fully the differences and similarities among gonads of bony fishes and other vertebrates, and to use go...

Journal: :Reproduction, nutrition, development 2000
D Cuminge J Smith R Dubois

We showed that, in the chick embryo, the fertilisation of the attractive germinal epithelium by primary germ cells can be represented by a three-dimensional diagram in which the space and time co-ordinates are graduated in terms of the segmentation of the axial and paraxial mesoderm. We thus established that the differentiation of the coelomic epithelium into an attractive germinal epithelium a...

Introduction: Cisplatin is a platinum-based drug widely used for the treatment of different cancers. Cell surface glycoconjugates play an important role in cell-cell interactions. The present investigation was carried out to study the toxic effects of double dose injection of cisplatin on cell surface glycoconjugates in rat as an experimental model. Methods: In this experimental study, 45 adul...

2010
Gisleine Fernanda França Harry J. Grier Irani Quagio-Grassiotto

Based on new knowledge coming from marine perciform species, the origin of oocytes and their development in the Ostariophysi, Gymnotus sylvius is described. In both Gymnotus sylvius and marine perciform fish, oogonia are found in the germinal epithelium that forms the surface of the ovarian lamellae. At the commencement of folliculogenesis, proliferation of oogonia and their entrance into meios...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید