Everything

• Segmentation

  Annelida,arthropoda,chordata
• Pseudocoelom

  Aschelminthes
• Acoelom

  Porifera-platyhelminthes
• Coelomate

  Annelida - chordata
• Digestive system absent

  Porifera
• Water canal system

  Porifera
• Cnidoblast

  Coelentrata (cnidaria)
• Comb plates [ locomotion]

  Ctenophora
• Flat body , hooks and suckers

  Platyhelminthes
• Worm shaped ,elongated

  Aschelminthes
• Ring like segmented body h

  Annelida
• Cellular level of organisation

  • Porifera
• Porifera

  • No digestive system
  • Body with pores and canals on walls
  • Water canal system
• Cnidoblast

  Coelentrata
• Porifera

  • Choanoytes
  • Skeleton made of spicules/spongin fibres
• Coelentrata

  • Gastrovascular cavity
  • Stinging capsule (Cnematocyst)
  • Nematocyst used for anchorage, food, defense
  • Metagenesis: polyp produce medusa asexually and medusa form polyp sexually
• Corals

  • Skeleton composed of calcium carbonate
• Coelentrata

  • Adamsia
  • Aurelia
  • Obelia
  • Hydra
  • Physalia
• Stomocord


  Rudimentary structure of hemichordates
• Water vascular system

  Echinodermata
• Uses of water vascular system

  Locomotion, capture and transport of food, respiration
• Eg for echinodermata

  As an CEO

  Asterias(stat fish) ,antedon(sea lily) , chcumaria(sea cucumber), echinus(sea urchin),ophiura(brittle star)
• Eg for hemichordata

  Balanoglossus, saccoglossus
• Proboscis gland


  Excretion of hemichordata
• Head , muscular foot and visceral hump

  Mollusca
• Radula

  In mollusca mouth contain file like rasping organ
• Eg for mollusca

  LOADPPSC

  Octopus, loligo,sepia,Pila,dentalium, aplysia,pinctada
• Chitinous exoskeleton

  Arthropoda
• Chitinous exoskeleton - N acetylglucosamine
• Body Consist of head ,thorax, abdomen

  Arthropoda
• Respiration in Arthropoda is through

  Gills,book gills , book lungs, tracheal system
• Gills - prawns,crabs

  Book Gills- limulus (king crab)

  Book lungs - scorpions ,spiders

  Tracheal system - Insect
• Excretion in Arthropoda

  Maldivian tubule
• Economically useful insects

  Laccifer,bambyx,apis
• Nephridia

  Excretion in annelida
• Parapodia

  Seen in aquatic annelids (nereis) for swimming
• Eg for annelida

  Earthworm,leeches,nereis,hirudinaria(leech)
• Fundamental characters of chordata

  •post anal tail

  •paired pharyngeal gill slits

  •nerve cord

  •Notochord
• Ventral heart

  Chordates
• Protonephridia

  Ecretory organ in cephalochordata