29 September 1999
Topic One:
Metamerism--serial repetition of body parts
Advantages of being metameric
- movement --peristalsis
= progressive contraction of body regions
- division of labor with specialization of
the body regions
Topic Two:
Protostomes and their evolution
Annelida
- metameric
- eucoelomate
- complete gut
- closed circulatory system
- segmentally arranged excretory organs (metanephridia)