共查询到18条相似文献，搜索用时 265 毫秒
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第一节公猪生殖器官及其机能公猪的生殖器官包括:(1)睾丸;(2)输精管道,分别为附睾、输精管和尿生殖道;(3)副性腺,分别为精囊腺、前列腺和尿道球腺;(4)阴茎。一、睾丸1.解剖睾丸是具有内外分泌双重机能的性腺,为长卵圆形,睾丸的长轴倾斜,前低后高。睾丸分散在阴囊的两个腔内。在胎儿期一定时期,睾丸才由腹腔下降入阴囊内。成年公猪有时一侧或两侧睾丸并未下降入阴囊,称为隐睾。隐睾睾丸的分泌机能虽未受到损害,但睾丸对一定温度的特殊要求不能得到满足,从而影响生殖机能。如系双侧隐睾,虽多少有点性欲,但无生殖能力。2.组织睾丸的表面被以浆… 相似文献
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公鸭和公鹅生殖器官的解剖 总被引：1，自引：0，他引：1
本研究解剖成年公鸭和公鹅各5只,对其生殖器官进行了形态学的观察。睾丸位于腹腔内,其体积的大小因鸭、鹅的年龄和性活动时期的不同而发生变化。附睾小。输精管的弯曲度各段不同;输精管与输尿管的并行关系,即使在同一个体也不全相同。阴茎比较发达,主要由二个纤维淋巴体和一个腺管构成。此外,在睾丸、附睾和阴茎内有淋巴组织。 对于成年公鸭和公鹅生殖器官的研究较少,所见资料有Sisson及 Grossman(1975),罗克(1983)和苏东顿(1982)等的有关报道。本研究对成年公鸭和公鹅的生殖器官进行了形态学的观察,为进一步开展鸭、鹅人工授精提供基础资料。 相似文献
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采用光镜和电镜技术,观察雏鸵鸟睾丸的显微和超微结构;采用免疫组织化学方法对NPY在睾丸内的表达进行研究,探明NPY在睾丸内的表达规律.光镜下可见,雏鸵鸟睾丸表面有一层由坚韧的结缔组织构成的白膜,它向睾丸实质内形成的结缔组织不发达,不形成睾丸纵隔和睾丸小隔;雏鸵鸟的曲精小管直径为85～90 μm,生精上皮由支持细胞和1～2层生精细胞构成,此时精原细胞已开始分裂增殖,可见明显的分裂相,初级精母细胞数量少,体积大.电镜下可见,精原细胞胞质内有少量线粒体、游离核糖体和内质网;初级精母细胞富含线粒体、游离核糖体、内质网和溶酶体;支持细胞与精原细胞之间界限清晰,胞质内含较多游离核糖体,其他细胞器不发达;间质细胞的胞核形状不规则,内含较多脂滴.免疫组化显示,NPY在曲精小管周围、睾丸小血管周围、精母细胞和睾丸间质内均有表达,在睾丸小血管周围和精母细胞内表达量较高,而在曲精小管周围和睾丸间质内表达量较低. 相似文献
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山羊睾丸附睾卵巢和子宫的淋巴流向 总被引：1，自引：0，他引：1
杨春林、王云祥、Fabian等对胎儿、婴儿和鼠等生殖器官的淋巴流向进行了较为细致的研究。而有关山羊内脏器官的淋巴系的研究国内外报道较少。张玉龙、肖传斌等对山羊心脏和胃的淋巴系作了较系统研究。关于山羊睾丸、附睾和卵巢、子宫淋巴系的研究，至今未见报道。鉴于生殖器官肿瘤的 相似文献
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《中国兽医杂志》2017,(12)
为研究牛膝多糖对炔雌醚(Quinestrol)致雄性大鼠生殖损伤的保护作用,以20只8周龄成年雄性SD大鼠为研究对象。随机分为4组,分别进行炔雌醚与牛膝多糖处理。试验结束后,取睾丸、附睾、精囊腺和前列腺称重,取精子检测品质,测定睾丸抗氧化酶活性并观察睾丸形态与组织结构,检测Tunel表达。结果表明,炔雌醚引起大鼠生殖器官重量减少,形态萎缩,组织结构异常,精子数量和品质下降,抗氧化酶活性降低;Tunel表达增加。而炔雌醚+牛膝多糖处理组睾丸抗氧化酶活性升高,Tunel表达减少,降低精子畸形、提高精子数量和品质,缓解生精小管损伤,提高生殖器官重量,最终改善雄性大鼠生殖功能。与对照组相比,单独牛膝多糖处理组睾丸抗氧化酶活性、组织结构和精子质量均有一定程度提高。综上表明,牛膝多糖有效抑制了炔雌醚对生殖功能的破坏作用,对雄性生殖功能具有改善作用。 相似文献
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<正> 一、生殖器官和繁殖特性 (一)麝鼠的生殖器官 麝鼠的生殖器官有与其功能相适应的特殊构造,公母鼠生殖器官的体积、重量和机能随季节改变呈现出规律性的周而复始的变化,是麝鼠季节性生殖的生理基础。 1.公鼠的生殖器官:由睾丸、附睾、输精管、副性腺和阴茎等组成。 相似文献
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本研究以不同发育阶段的雄性雏鸵鸟(Struthio camelus)为试验动物,在其饮水中添加不同剂量的硼,采用放射免疫分析法(radioimmunoassay,RIA)检测不同硼水平和不同发育阶段雏鸵鸟血清中卵泡刺激素(follicle stimulating hormone,FSH)、黄体生成素(luteinizing hormone,LH)、睾酮(testosterone,T)、雌二醇(estradiol,E2)的含量,旨在探明硼对雏鸵鸟血清性激素水平的影响。研究结果表明,雄性雏鸵鸟血清FSH和E2含量均随硼添加量的增加而增加;LH和T的含量随硼添加量的变化表现出一定的相关性,且均表现为低硼水平其含量升高,中硼和高硼水平其含量降低;LH和T的含量随年龄增大而增加,E2逐渐减小,而FSH则先升高后下降。该结果提示,硼对鸵鸟内分泌与生殖具有一定的调节作用,且年龄对雏鸵鸟血清性激素水平有一定影响。 相似文献
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P. C. Ozegbe W. Kimaro M.-C. Madekurozwa J. T. Soley T. A. Aire 《Anatomia, histologia, embryologia》2010,39(1):7-16
The volumetric proportion of the various ducts of the epididymis of the emu and ostrich and the immunohistochemistry of actin microfilaments, as well as cytokeratin, desmin and vimentin intermediate filaments, were studied in the various ducts of the epididymis of the emu and ostrich. The volumetric proportions of various ducts, which are remarkably different from those of members of the Galloanserae monophyly, are as follows: the rete testis, 5.2 ± 1.4% for the emu and 2.4 ± 1.8% for the ostrich; efferent ducts, 14.2 ± 2.3% (emu) and 11.8 ± 1.8% (ostrich); epididymal duct unit, 25.8 ± 5.8% (emu) and 26.1 ± 4.1% (ostrich) and connective tissue and its content, 54.7 ± 5.8% (emu) and 60.0 ± 4.9% (ostrich). Unlike in mammals and members of the Galloanserae monophyly, only vimentin was immunohistochemically demonstrated in the rete testis epithelium of the emu, and none of the cytoskeletal protein elements in the ostrich rete testis. The epithelium of the efferent ducts of the emu co-expressed actin, cytokeratin and desmin in the non-ciliated type I cells, and vimentin in the ciliated cell component. The ostrich demonstrated only cytokeratin in this epithelium. The ratite epididymal duct unit is different from that of mammals in lacking actin (only weaky expression in the ostrich), desmin and cytokeratin, and a moderate/strong immunoexpression of vimentin in the basal cells and basal parts of the NC type III cell in the epididymal duct unit. Immunoexpression of the microfilaments and intermediate filaments varied between the two ratite birds, as has been demonstrated previously in birds of the Galloanserae monophyly, and in mammals. 相似文献
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Ofri R Millodot S Shimoni R Horowitz IH Ashash E Millodot M 《American journal of veterinary research》2001,62(5):812-815
OBJECTIVE: To follow the development of the refractive error in the eyes of ostrich chicks from age 0 to day 37 after hatching. ANIMALS: 35 ostrich chicks. PROCEDURES: Spot retinoscopy was conducted to assess refractive error in ostrich chicks. Seventy eyes of 35 ostrich chicks were examined. Of these, 18 chicks were followed over time. At least 4 serial measurements (at 2- to 7- day intervals) were conducted in each of these chicks from day 1 to 37 after hatching. Seventeen additional chicks were examined on days 0, 3, 12, and 19 after hatching. RESULTS: Ostrich chicks were myopic at hatching, with a mean +/- SD refractive error of -4.47 +/- 0.15 diopters (D). The refractive error rapidly decreased during the first week of life, and by day 7 after hatching, chicks were slightly hyperopic, with a mean refractive error of 0.42 +/- 0.12 D. After day 7, there were no significant differences in the mean refractive error. CONCLUSIONS: The development of optics in the ostrich eye appears to be unique among animals and is characterized by myopia at hatching, rapid onset of emmetropia, and minimal variation in refractive error among chicks. 相似文献
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Effect of climate region and stocking density on ostrich (Struthio camelus) productive performances 
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下载免费PDF全文 M Bouyeh A Seidavi H Mohammadi A Sahoo V Laudadio V Tufarelli 《Reproduction in domestic animals》2017,52(1):44-48
The effects of three climates (hot and dry, mild and humid and Alpine) and three flock densities (<100, 100–300 and >300 m2) on ostrich reproductive and productive traits were studied. Data were compared with the benchmark target sets by the World Ostrich Association (Ostrich benchmark Performance Targets. Version 2, May, 2008) for reproductive qualifications of ostrich. No significant difference was observed on egg production, weight, fertility, hatchability and day‐old chicks weight among the three climate conditions; however, the Alpine climate had a lower performance trend. Mild and humid climates had a significant effect of age at sexual maturity for both males and females as well as on the duration of egg production season. Stocking density did not show significant difference on egg production, hatchability, age of male and female at sexual maturity and on duration of egg production season, while an area >300 m2 showed a reduction in egg weight and day‐old chick weight. Further, an area <100 m2 led to a weaker ostrich fertility rate. Results showed that the ostrich would have a better performance under hot and dry and mild and humid climates as compared to Alpine climate with a stocking density of 100–300 m2 area per breeder bird. Thus, climatic intervention strategies at Alpine regions may be carried out for maintaining optimal reproductive qualification of ostrich so as to improve the productivity in this sector. 相似文献
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