PLATYHEMINTHES

PLATYHEMINTHES

1. TRIPLOBLASTIC

2. ACOELOMATE

3. NO BLOOD SYSTEM

4. SINGLE GUT OPENING

   • BRANCHED GUT - PLANARIA
     • TRICLAD
       • INTESTINE
         • ONE ANTERIOR
         • TWO ANTERIOR BRANCHES

5. DISTINCT HEAD

   • SENSE ORAGNS
   • PRIMITIVE BRAIN
     • CEPHALISATION
       • DEVELOPMENT OF COMPLEX STRUCTURES IN THE BRAIN

6. PROTONEPHRIDA

   • EXCRETORY/OSMOREGULATION STRUCTRUE

7. CLASS TURBELLARIA

   • FREE LIVING AQUATIC
   • OUTER SURFACE COVERED IN CILIA, FOR LOCOMOTION
   • DELICATE SOFT BODY
   • SENSE ORGANS IN ADULTS
   • ENTERON PRESENT

8. CLASS CESTODA

   • ENDOPARASITIC ( LIVE INSIDE HOST)
   • ELONGATED BODY
     • DIVIDED INTO PROGLOTTIDS WHICH ARE ABLE TO BREAK OFF.
   • SUCKERS AND HOOKS ON HEAD FOR ATTACHMENT TO HOST
   • THICK CUTICLE
   • NO ENTERON
   • SENSE ORGANS ONLY IN FREE LIVING LARVAL STAGE

9. TAPE WORM

   • STROBILATION
     • PROCESS OF TRANVERSE FISSION WHICH PRODUCES PROGLOTTIDS
       • STROBILUS - RIBBON LIKE CHAIN OF PROGLOTTIDS