Go Back   Freethought Forum > The Library > Articles & Essays > Science

Comment
 
Article Tools Display Modes
An Introduction to Zoology: Chapter 9
An Introduction to Zoology: Chapter 9
Published by The Lone Ranger
11-28-2008
Default Introduction

An Introduction to Zoology

Chapter Nine: The Radiata: Phylum Cnidaria:



The Eumetazoans:
The eumetazoans, as you recall, are the “true animals.” Unlike the parazoans, eumetazoan animals possess true tissues, and most of them have organs as well. Also unlike the parazoans, all of the eumetazoans have some degree of body symmetry, and all eumetazoans undergo embryonic development.


Another thing that distinguishes the eumetazoans is that most of them have two types of tissues that are found in no other living organisms. These tissue types that are unique to eumetazoan animals are neural (nervous) tissue and muscular tissue. In most eumetazoans, muscle tissue is attached to some sort of supportive skeleton – either an internal endoskeleton or an external exoskeleton.


Contents

Article Tools

Featured Articles
<< <    Next Page: The Radiata and the Bilateria (Page 1 of 21)    >  >>
Thanks, from:
Ensign Steve (12-13-2008)
Comment

  Freethought Forum > The Library > Articles & Essays > Science


Currently Active Users Viewing This Article: 1 (0 members and 1 guests)
 
Article Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

 

All times are GMT +1. The time now is 07:39 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

Article powered by GARS 2.1.8m ©2005-2006
Page generated in 0.20357 seconds with 17 queries