| Change log entry 48970 | |
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| Processed by: | goldyn_chyld (2013-06-25 21:15:07 UTC) |
| Comment: |
<< review queue entry 44676 - submitted by 'richwarm' >> protonephridium [‚prōd·ō·nə′frid·ē·əm]. (invertebrate zoology). A primitive excretory tube in many invertebrates. The protonephridium consists of a hollow cell located in the body cavity and a duct leading from it to an exterior opening, called a nephridiopore. Fluid in the body cavity filters into the hollow cell, called a flame bulb (or flame cell) if it possesses cilia, or a solenocyte if it has a flagellum. In either form, the cilia or the flagellum wave filtered urine down the tube to the outside. example ~ 而排泄是排泄系统的一部分，由排泄器官如肾脏（马氏管、原肾管、后肾管或其他动物类排泄器官）吸收血液（或体腔液）中代谢废物并排出体外的过程。 Wp ~ 原腎管(單數：Protonephridium複數：Protonephridia)是很多兩側對稱的無脊椎動物(扁形動物、線蟲動物、紐形動物、內肛亞門苔蘚動物)的主要排泄器官，成對出現。它是只有一端開口的盲管,通常有很多分支，遍布生物體內各處，收集廢液。原腎管由胚胎的外胚層內陷形成。而且是細胞內管。 http://zh.wikipedia.org/wiki/%E5%8E%9F%E8%82%BE%E7%AE%A1 |
| Diff: |
+ 原腎管 原肾管 [yuan2 shen4 guan3] /protonephridium (invertebrate anatomy)/ |