Talk:Cnidocyte

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(To the tune of George M. Cohen's Harrigan):

J, E, double-L Y,
F-I-S spells JELLYFIS!
If to eat me in your head you take the notion,
I'm no treat because I'm mostly made of ocean!
C, O, E-L-E-N-T,
E-R-A-T-E:
With a twist of the wrist
I'll discharge a nematocyst
JELLYFIS! That's me!

Contents 1 Image removal 2 Image 3 Copy-edit and expert attention needed 4 nematocysts are not cells 5 Evolution

[edit] Image removal

cnidocyte.gif and nematocyst.jpg have been removed because copyrighted.

[edit] Image

That nematocyte image needs to be scaled down. As of now it stares people in the face, and that is not a good way to do it in a published encyclopedia unless you have seperate pages. And we don't have that here. The image is nice, just a bit large for Wikipedia. Spoiled Silk 15:13, 26 March 2007 (UTC)

[edit] Copy-edit and expert attention needed

What is a cnydocyte -- a cell, an organism, a sub-cellular structure, a car? The article should introduce the subject with a definition or near-definition, and a few general sentences. There should be no section titled "General introduction": the text before the first section is the introduction. The article should stay on topic, connect the sentences, and explain related topics and their connection to the subject. The language and structure are needlessly complex; they should be simplified. -Pgan002 00:29, 4 August 2007 (UTC)

• I noticed that the problems were largely due to vandalism. I improved the page and remove the tags. -Pgan002 01:59, 4 August 2007 (UTC)

[edit] nematocysts are not cells

The opening to this topic indicates that nematocysts are, like cnidoblasts (the proper term, cnidocyte is also used but not technically correct), cells. The nematocyst is not a cell, it is the extension of the cnidoblast cell membrane, making it an organelle. Integrated Principles of Zoology, Hickman, et al, probably any edition and year. mcnolan (talk) 17:50, 6 February 2008 (UTC)

[edit] Evolution

The article reads, concerning cnidoblasts: "It evolved in these aquatic animals as a means for them...". No structure evolves as a means for anything. The structure begins as some simple variation on a regular cell and the environment selects for it due to the advantage that the new variation gives the organism to survive and reproduce and pass on that variation. Cnidoblasts did not evolve SO the organisms could use them to feed. The cnidoblast evolved because each minor genetic change to the cell increased the organisms' ability to use the cellular organelle for catching food. No structure arises due to need. If the genetics are not there, there is no structure formed. mcnolan (talk) 17:58, 6 February 2008 (UTC)