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sperm duct
相关语句
  输精管
     The adult's spermary likes a kidney,the sperm duct slretch out from ventral aspect.
     成鱼精巢呈肾形,腹面有输精管伸出,内部构造为小管型.
短句来源
  “sperm duct”译为未确定词的双语例句
     Fifty Cases of Intestine Tensure Strangulations Caused by Sperm Duct in Steer
     去势公牛输精管绞窄小肠50例
短句来源
  相似匹配句对
     Study on Sperm
     精子 谁主沉浮
短句来源
     Fifty Cases of Intestine Tensure Strangulations Caused by Sperm Duct in Steer
     去势公牛输精管绞窄小肠50例
短句来源
     The adult's spermary likes a kidney,the sperm duct slretch out from ventral aspect.
     成鱼精巢呈肾形,腹面有输精管伸出,内部构造为小管型.
短句来源
     CatSper and Sperm Hyperactivation
     CatSper与精子超活化
短句来源
     Optimization of lens duct
     透镜导管的优化设计
短句来源
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  sperm duct
The end of the bursa mouthpiece towards the bursa is formed by a so-called 'sorting apparatus' which consists of different cells; opposite the bursa the sperm duct ends in a globe-shaped sperm vestibule.
      
The main components of the bursa mouthpiece are numerous ring-shaped bursa mouthpiece cells whose central parts contain strengthened elements forming a tube around the sperm duct.
      
This low buffering capacity is likely to facilitate the role of the sperm duct epithelium in semen pH regulation and thus, in the sperm's acquisition of the potential for motility upon exposure to water.
      
Pretreatment of fish with 17α,20β-dihydroxy-4-pregnen-3-one (17α,20β-P) significantly increases milt volume but is without effect on resting or stimulated (IMX + db-cAMP) levels of sperm duct ion transport.
      
The sperm duct epithelium of brook trout (Salvelinus fontinalis), mountedin vitro in Ussing-style epithelial chambers actively absorbs Na+ (measured as the short-circuit current, Isc) and secretes K+ (measured using86Rb+ as tracer).
      
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In the present paper a new genus and species from Minxian County, Gansu Province is discribed.Isosetosa gen. nov.Setae in four bundles per segment, four setae per bundle. Head pore at O/I, dorsal pores absent. The pharynx has on its roof a raised flat plate of very high and slender epithelial cells. Chylus cells occur in the intestinal wall. Peptonephridia present. Origin of dorsal vessel post-clitellar. Male funnel cylindrical. Sperm sacs and ovisacs present. Penial bulb of lum-bricilline type. Terrestrial.Isosetosa...

In the present paper a new genus and species from Minxian County, Gansu Province is discribed.Isosetosa gen. nov.Setae in four bundles per segment, four setae per bundle. Head pore at O/I, dorsal pores absent. The pharynx has on its roof a raised flat plate of very high and slender epithelial cells. Chylus cells occur in the intestinal wall. Peptonephridia present. Origin of dorsal vessel post-clitellar. Male funnel cylindrical. Sperm sacs and ovisacs present. Penial bulb of lum-bricilline type. Terrestrial.Isosetosa minxianensis sp. nov. (PI. Ⅰ, Ⅱ)Length 5.5-9.0mm, width 0.4-0.6mm (Ⅻ), segments 30-41. Whitish in colour. Head pore at O/I. No dorsal pores. Clitellum in 1/2 Ⅺ-ⅩⅢ ( = 21/2). Spermathecae pores one pair, in 4/5. Male pores situated on the papillae of the ventro-lateral sides of Ⅻ. Female pores in 12/13. We observed 5 total mount specimens, longitudinal 2 and cross 1 series section specimens. Brain in Ⅲ. There are more perinucleat bodies in brain and ventral nerve cord. It may come to 48 in brain. Septal glands 3 pairs, in 4/5-6/7, connected with septa. The pharynx has a raised flat plate on its roof, this plate can be extruded through the mouth. Intestinal diverticula absent. Peptonephridia present, in Ⅳ. Chylus cells present. Blood colourless, cardiac body absent, dorsal vessel originating from post-clitellum. Testes one pair in Ⅺ, ovaries one pair in Ⅻ. Male funnel cylindrical, sperm duct long but confined chiefly to Ⅻ. Sperm sacs and ovisacs present. Penial bulb of lumbricilline type. Spermathecae one pair in V, not connecting with the digestive tract, diverticula absent.Holotype: Minxian 3(3), length 6mm, width 0.4mm, segments 30.Paratype: Minxian 1, adults 3, Juveniles 48; Minxian 2, juveniles 6; Minxian 3, adults 36, juveniles 5. Both holotype and paratype were collected from Minxian County, Gansu Province, China, on Sept. 22, 1969, Jul. 10, 1986, and Oct. 8, 1986.Type specimens are deposited in the Department of Biology, Nanjing University, Jiangsu Province, China. Distribution: Terrestrial. Minxian (34.3°N, 106°E), Gansu, China.Remarks: Bretschcr (1900) found that in Behemia Enchytraeids greatly injured the cultivation of sugar beet, and Jegen (1920) found that the worms pierced the delicate tissues of the smaller roots and sucking the sap. On the other hand, some other authors recorded their opinion that the initial injury was due to a various causes -fungi, bacteria, and other pests. We have more recently come to a similar conclusion. Nematodes were never found around the roots, in the tissues of the lower part of the stalks or under the leaf sheathes. We found that the most earthworms lived under epidermis and within the tissue of decomposed root, but few of them were in wealthy root sometime. So fungi and earthworm were both the assailants.This genus is similar to Fridericia Michaelsen (1889), in hiving peptonephridia, chylus cells, no cardiac body and intestinal diverticula, but differs from latter in having flat plate, setae cqual and not arranged in fan-shaped, spermathecae not connecting with the digestive tract and no diverticula, no dorsal pores. With regard to the feature of setae, the position of head pore, no dorsal pores, and flat plate present, this new species is related to Enchytraeus barku-densis Henle. It differs from the latter in having chylus cells and spermathecae not connecting with the digestive tract. Therefore, it is really a new genus and species.

栖居于名贵中药当归 Angelica sinensis(Oliv.)Diels根部的蚯蚓经鉴定为线蚓科(Fnchytraeidae)的一新属新种——岷县等毛蚓 Isosetosa minxianensis。新种的主要特征:头孔位于O/I,无背孔,体白色,环带位于1/2Ⅺ—ⅩⅢ(=21/2节)。每节刚毛4束,每束刚毛4根,每根棍棒状,外端略尖。受精囊孔一对,位4/5节间沟内。雄孔一对,位第Ⅻ节。雌孔一对,位于12/13节间沟内。脑位于第Ⅲ节内。在脑和腹神经索的切面内可见到神经原的核周体。隔膜腺三对,位于4/5—6/7隔膜的后壁上。咽头顶部具有扁平板。无肠盲囊。在第Ⅳ节内有消化肾管、乳糜细胞。背血管起目环带后。精巢一对,不分叶,位于第Ⅺ节内。卵巢一对,位于第Ⅻ节内,具精囊和卵囊,阴茎球为带丝蚓型。受精囊一对,位于第Ⅴ节内,不与消化道相连,亦无盲管分支。本新属与白线蚓属 Fridericia Michaelsen、线蚓属 Enchytraeus Henle相近,但有明显差异。经与Enchytraeus barkudensis Henle进行比较,也有明显差別,本种的受精囊不与消化道相连,肠壁内有乳糜细胞,故确定为新...

栖居于名贵中药当归 Angelica sinensis(Oliv.)Diels根部的蚯蚓经鉴定为线蚓科(Fnchytraeidae)的一新属新种——岷县等毛蚓 Isosetosa minxianensis。新种的主要特征:头孔位于O/I,无背孔,体白色,环带位于1/2Ⅺ—ⅩⅢ(=21/2节)。每节刚毛4束,每束刚毛4根,每根棍棒状,外端略尖。受精囊孔一对,位4/5节间沟内。雄孔一对,位第Ⅻ节。雌孔一对,位于12/13节间沟内。脑位于第Ⅲ节内。在脑和腹神经索的切面内可见到神经原的核周体。隔膜腺三对,位于4/5—6/7隔膜的后壁上。咽头顶部具有扁平板。无肠盲囊。在第Ⅳ节内有消化肾管、乳糜细胞。背血管起目环带后。精巢一对,不分叶,位于第Ⅺ节内。卵巢一对,位于第Ⅻ节内,具精囊和卵囊,阴茎球为带丝蚓型。受精囊一对,位于第Ⅴ节内,不与消化道相连,亦无盲管分支。本新属与白线蚓属 Fridericia Michaelsen、线蚓属 Enchytraeus Henle相近,但有明显差异。经与Enchytraeus barkudensis Henle进行比较,也有明显差別,本种的受精囊不与消化道相连,肠壁内有乳糜细胞,故确定为新属新种。经过调查,本种蚯蚓有时少数也在健康的当归根部生活,因此也可能直接为害健康植株。

This paper has give a systematic description to the morphology and histology structure of the reproductive system of Eriocheir sinensis . The male reproductive system is composed of testis, vas efferens, vas deferens, seminal vesicle,accessory gland, ejaculatory duct and male genital pore. The female reproductive system is composed of ovary, seminal receptacle oviductus, vagina and female genital pore. The differences between our results and others are: in the male reproductive system, the paired tests...

This paper has give a systematic description to the morphology and histology structure of the reproductive system of Eriocheir sinensis . The male reproductive system is composed of testis, vas efferens, vas deferens, seminal vesicle,accessory gland, ejaculatory duct and male genital pore. The female reproductive system is composed of ovary, seminal receptacle oviductus, vagina and female genital pore. The differences between our results and others are: in the male reproductive system, the paired tests consist of numerous coiling convoluted seminiferous tubule. The sperm duct can be divided into vas efferens, vas deferens and seminal vesicle. The vas efferens bigins in the rear portion of the testis then protruding in a highly coiling way. There is only one thin layer of circular muscle in the wall of seminal visicle. (no longitudina muscle in it). The muscle in ejaculatory duct obviously be divided into two layers: the outlayers is very thick circular muscle, and the innerlayer is thin longitudina muscle. The paper also divided and described the histology of the vagina about the female reproductive system. In the female crob which are copulated, there are considerable changes in the epithelium free ends of the seminal receptale before and after of oviposition.

对我国的一种重要经济蟹类——河蟹(Eriocheirsinensis)生殖系统的形态学和组织结构进行了较全面的描述.我们发现与过去有关学者描述不同的有:雄性生殖系统的精巢由多数曲精细管盘旋而成;过去划分的输精管可分为输精小管、输精管和贮精囊三部分;输精小管始于近精巢的后端,伸出精巢后的盘曲部分包括输精小管和输精管;贮精囊壁只有薄层环肌,没有纵肌;射精管壁肌肉明显分为两层:外环内纵,环肌较厚,纵肌较薄.雌性生殖系统划分并描述了阴道的组织结构;交配后的雌蟹,其受精囊上皮游离端存在有产卵前后的显著变化.

The morphological structure and function of the seminal vesicles in male Bostrichthys sinensis were studied by means of histology, transmission electron microscope and Enzyme-linked Immunosorbent assay. The results showed that the seminal vesicles, enclosed by capsula, were a pair of accessory glands to the testes. The seminal vesicle was divided into many locule lumina by the connective tissue partition. Both capsula and partition consisted of smooth muscle fibers, blood capillaries, fibroblasts, fibrocytes...

The morphological structure and function of the seminal vesicles in male Bostrichthys sinensis were studied by means of histology, transmission electron microscope and Enzyme-linked Immunosorbent assay. The results showed that the seminal vesicles, enclosed by capsula, were a pair of accessory glands to the testes. The seminal vesicle was divided into many locule lumina by the connective tissue partition. Both capsula and partition consisted of smooth muscle fibers, blood capillaries, fibroblasts, fibrocytes and interstitial cells. Single epithelial cells, which were columnar, cuboidal or squamous in shape, were arranged along the partition. During the spawning season, rough endoplasmic reticulum, tubular cristae mitochondria and Golgi complex were well developed; many secretory granules without membranes accumulated to the apical portion of the epithelial cell. The cell organelles degenerated and large vacuoles appeared after the secretory granules were released. The sphincter muscles were not found from the outlet of the seminal vesicles to the sperm ducts. Fibroblasts were characterized by synthesizing and secreting collagen. The morphology of interstitial cells in the seminal vesicle was similar to that of Leydig cells in the testes. At the peak period of spawning, a large number of spermatozoa, which were mixed with the secretion, appeared in proximal, middle and distal parts of the seminal vesicles. The epithelial cells inside the different locules of the seminal vesicle developed asynchronously. The results showed that sperm added to the seminal vesicle fluid could increase sperm motility, prolong sperm longevity, and improve the fertilization rates of spermatozoa. Fiber-like secretion of the seminal vesicles showed PAS positive reaction in dark purple-red colour, suggesting that the secretion should be mucopolysaccharide-mucin. The seminal vesicle fluid contained 17αOH-P, PGE 2 and PGF 2αwhich could induce female broodfish to spawn, indicating this fluid functions as a sex pheromone .

应用组织学、透射电镜及酶联免疫吸附分析法研究了雄性中华乌塘鳢贮精囊的形态结构 ,并探讨其功能。结果表明 ,贮精囊是一对精巢的附属腺体 ,结缔组织隔膜将贮精囊分隔成为许多小室腔。被膜和隔膜中含有平滑肌纤维、毛细血管、成纤维和纤维细胞以及间质细胞。隔膜上排列单层上皮细胞 ,呈柱形、立方形或扁平形 ,生殖季节粗面内质网、管状嵴线粒体和高尔基复合体发达 ,上皮细胞顶部聚集许多无膜包裹的分泌颗粒 ,分泌后细胞器退化 ,胞质中出现大量的大空泡。成纤维细胞具有合成分泌胶原蛋白的结构特征。贮精囊中的间质细胞与精巢中的Leydig型间质细胞形态特征相似。在生殖高峰期不论贮精囊的近端、中央或远端均先后贮存大量的精子 ,混合在分泌物中 ,贮精囊不同小室的上皮细胞发育并不同步。精液加贮精囊液的实验表明 ,贮精囊液有助于增强精子活率和延长精子寿命 ,并能促进受精率的提高。贮精囊纤维丝状分泌物呈深紫红色的PAS阳性反应 ,提示分泌物为粘多糖蛋白 ,贮精囊液含有 17α羟孕酮、PGE2 和PGF2α,能体外诱发雌亲鱼产卵 ,具有性外激素的重要作用

 
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