Fwd: agnatha

---------- Forwarded message ----------
From: Lynch, Benjamin <benjamin.lynch@hanovernorwichschools.org>
Date: Thu, May 30, 2013 at 10:37 AM
Subject: agnatha
To: thermanson.1.vertebrates@blogger.com

HAGFISH

Common Name: "no jaws"

Distinguishing features: Agnatha are characterized by lacking a jaw and by having a notochord (a flexible rod-shaped body) in both larvae and in adults. They also lack paired fins and they have seven or more paired gill pouches. They are cold blooded, and they have a cartilaginous skeleton. Agnatha do not have an identifiable stomach or any appendages. Fertilization and development are both external and their heart contains 2 chambers.

Examples include hagfish and lampreys. 

Sources: http://en.wikipedia.org/wiki/Agnatha

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDvurCZyPjjaBl1eKyN2S9gEg2WNTM23fRTXQzw94WSEH01dufklD4l8rTqzO-OvGwpqTe7ayOFEa0DUld9B9AsgoGN7nGLtues7avDJCVT0m6nrTTbg-WURTTTNzbMh7OxaZqFBI3m3tD/s1600/Hagfish.jpg