redia

/ree-dee-uh/US // ˈri di ə //UK // (ˈriːdɪə) //

红亚,红霞,红叶

Definitions

n.名词 noun

1
plural re·di·ae [ree-dee-ee]. /ˈri diˌi/. Zoology.
- : a cylindrical larval stage of some trematodes, produced by a sporocyst and giving rise to daughter rediae or to cercariae.

This produces within itself numbers of a small creature which is called the Redia form.
The Redia has anteriorly a mouth leading into a muscular pharynx and thence into a ccal stomach.
The Cercari are developed from spherical masses of cells found in the body cavity of the Sporocyst or Redia.
The Cercari when fully developed leave the Sporocyst or Redia, and then their host, and become free.