Flatworms, with their 3 clearly defined cell layers and bilateral symmetry, represent an important advance in early animal evolution. This program provides detailed observations on structure, behaviour and their life cycles.
Phylum Annelida is made up of segmented worms divided into 3 classes: Subclass Oligochaetes such as Tubifex, Class Polychaetes such as Nereis and thousands of other species that live in almost all marine habitats & Leeches.
They are armoured creatures with jointed legs and they have developed elaborate behaviour patterns that assure survival. They are also the most successful phylum in the animal kingdom - phylum Arthropoda.
The goal of this program is to show a representative sample of the great diversity of protists, and to show why they need a new classification reflecting our growing understanding of their long evolutionary history.