Lab 17- The Deuterostomes: Phyla Echinodermata and Chordata

1.)Understanding early embryological development in Echinodermata 2.) Recognize the morphological features that distinguish the 5 classes of Echinodermata. 3.) examine the morphology of Asterias (a sea star) and understand how this organism moves. 4.) know the characteristics of phylum Chordata 5.) Know the classification of chordates by subphylum. 6.) Examine the morphology of Perca (yellow perch) a typical bony fish.

What does it mean for an organism to be a deuterostome?

They develop their anus first and then their mouth! They have a well developed endoskeleton.

What are the two phylum we look at that are endoderms?

chordata and echinodermata

Echinodermata are intervertebrate. What does this mean?

This means that they do not have a vertebrae (spine).

What type of symmetry do echinodermata have?

bilateral

What is their dermal skeleton called?

ossicles

What type of vascular system do echinodermata have?

a water vascular system!

What do they do with tube feet?

They use it for locomotion, respiration, and food acquisition.