• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Molluscan Studies >Structure of the excretory system of Hawaiian nerites (Gastropoda: Neritoidea)
【24h】

Structure of the excretory system of Hawaiian nerites (Gastropoda: Neritoidea)

机译：夏威夷螨虫排泄系统的结构（天麻：Neritoidea）

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Neritoidean gastropods are present in freshwater, brackish and marine environments, which vary in salinity and exposure to dehydration. In this study we examine the structure of the excretory system of Hawaiian nerites, which indicates possible processes that enable these gastropods to survive in a wide range of environments in the Hawaiian Islands. As is true of other nerites studied to date, the main excretory mechanism of Hawaiian nerites is through filtration of the blood between podocytes in the auricle epicardium, resulting in production of an ultrafiltrate, which collects in the pericardial cavity. No podocytes are present on the surface of the ventricle of Hawaiian nerites. The reno-pericardial canal conveys the urine to the kidney, the epithelium of which is composed mainly of acidophilic cells in marine nerites. In brackish and fresh water species, basophilic cells are present in addition to the acidophilic cells present in marine nerites. It is proposed that the basophilic kidney cells allows non-marine nerites to osmoregulate and produce a hyperosomotic urine at low salinities. A bladder is present, and empties into the mantle cavity near the gill by way of a ureter.
机译：淡水，微咸水和海洋环境中均存在Neritoidean腹足动物，其盐度和暴露于脱水的程度各不相同。在这项研究中，我们检查了夏威夷恶臭菌排泄系统的结构，该结构表明了使这些腹足类动物能够在夏威夷群岛的广泛环境中生存的可能过程。正如迄今研究的其他神经质一样，夏威夷神经质的主要排泄机制是通过滤除耳廓心外膜足细胞之间的血液，从而导致产生超滤液，并收集在心包腔中。夏威夷虫的脑室表面没有足细胞。肾上心包管将尿液输送到肾脏，肾脏的上皮主要由海洋神经突中的嗜酸细胞组成。在咸淡水物种中，除了存在于海洋nerite中的嗜酸性细胞外，还存在嗜碱性细胞。有人提出嗜碱性肾细胞可以使非海洋神经质渗透并在低盐度下产生高渗尿。存在膀胱，并通过输尿管将其排入the附近的套腔中。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号