Definition: The middle region of an arthropod's body, between the head and abdomen. The thorax region bears the legs and wings of an insect.
By Debbie Hadley, About.com Guide
The top 10 fossil discoveries between 2000 and 2010. More >
Being well prepared is the first step; here are more essential suggestions. More >
©2010 About.com, a part of The New York Times Company.
All rights reserved.