Annelida

Annelida

1. are ringed or annulated

2. mostly marine some terrestial species excist

   • habitat in areas such as sand flats and deep sea vents

3. chemoautotrophic in deep sea life

4. pelagic

5. tubifex worm example of detritovores

6. can be parastite

   • example of it si leeches

7. bauplan

   • schizocoelous
   • digestive system comples and specialized by region
   • closed circulatory stystems
     • have a "heart"
   • respire through skin
   • metanephrida
     • Each segment with parapodia and chaetae
   • segmented body
     • head has two parts prostomium peristomium
     • Terminal (posterior) segment: pygidium
   • locomotion through hydrostatic skeleton

8. classes

   • polychaeta
     • most primtive parapodia with chaetea have plalps with antenne
     • can asexualy reproduce
     • sexually produces trochophore larave
     • sectiosn added via metamerism
   • oligocheata
     • little to no palps or anteena
       • ve a clitellum- saddle
         • limited regenerative power
           • hermaphrodictic
   • Hirudinea
     • blood feeders
     • sexual simiar to oligiocheara and uses a cancoon