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Functional Morphology of Countercurrent Transfer System

逆流传输系统的功能形态

基本信息

批准号：
01560286
负责人：
NISHIDA Takao
金额：
$ 1.09万
依托单位：
Nihon University (1990)The University of Tokyo (1989)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01560286/
关键词：
countercurrent transfer spermatic cord pampiniform plexus rete mirabile 蔓状静脈叢磁網

项目摘要

1. There were no direct connections between the testicular artery and vein in the golden hamster, rat, boar, goat and ox. However, the arterial and venous wall reduced the thickness by sharing a common tunica adventitia.2. The lymphatic vessels, mast cells and macrophages were widely distributed within the loose connective tissue of the testicular arteriovenous walls. These histological findings suggest that the mast cells may play a role in the coutercurrent transfer mechanism.3. The direct connection between the testicular artery and pampiniform plexus was observed in the tree shrew and squirrel spermatic cord. From the ultrastructure of vesiculated cells situated in the A. -V. shunt wall, it is suggested that these vesiculated cells are active in synthesizing the substance which effects a control of the shunt diameter.4. The testicular veins in the boar spermatic cord could be subdivided morphologically into 4 types. The type IV vein was arranged in the tunica media of the testicular artery and was regarded as a portal vessel, being considered to be the most important vessel in promoting the countercurrent transfer between the testicular arteries and veins.5. A carotid body-like structure was observed in the rete mirabile and cavernous sinus complex. This ultrastructure corresponded with that of carotid body which lay in the angle of division of the internal and external carotid arteries.6. In the injection of HRPO into the cattle trigeminal and trochlear nerves, HRPO positive nerve fibers and nerve cells were recognized only in the trochlear nerve.

1.金黄地鼠、大鼠、公猪、山羊和牛的睾丸动、静脉之间无直接联系。动脉壁和静脉壁由于共用外膜图尼卡而增厚。淋巴管、肥大细胞和巨噬细胞广泛分布于睾丸动静脉壁疏松结缔组织内。这些组织学结果表明肥大细胞可能在逆流传递机制中发挥作用.在树鼩和松鼠的精索中，睾丸动脉与蔓状丛有直接联系。从泡状细胞的超微结构来看，A. -V.分流壁，这表明这些囊泡细胞在合成影响分流直径控制的物质方面是活跃的。猪精索内的睾丸静脉可分为4种类型。IV型静脉位于睾丸动脉的图尼卡中膜，被认为是促进睾丸动、静脉间逆流的最重要血管，是门静脉.在迷网和海绵窦复合体中观察到颈动脉体样结构。这种超微结构与位于颈内动脉和颈外动脉分叉角的颈动脉体的超微结构相对应.在牛三叉神经和滑车神经内注射HRPO，仅在滑车神经内可见HRPO阳性神经纤维和神经细胞。