disection of Lubricus
Oligochaeta - The class Oligochaeta includes the megadriles (earthworms), which are both aquatic and terrestrial, and the microdrile families such as tubificids, which include many marine members as well.
have longitudinal mussles
segments appear similar
earth worms create tunnels
Polychaeta - This is the largest group of the Annelids and majority are marine. All segments are identical each consisting a parapodia. The parapodia are used for swimming, burrowing and feeding current.
Leeches (Hirudinea) - These include both bloodsucking external parasites and predators of small invertebrates.
Predators and parasites
less obvious body segment
most have sharp jaws
clot-busting- anitcoagulant properites in secreted saliva
Slide 50 Leech