Flatworms and Cnidaria PDF

Phylum: Ctenophora (Acnidaria) NEPŔHLIVCE/REBROVKY  belong to Diblastica  radially or biradial symmetrical  marine  carnivorous  body contains an internal cavity, a mouth and anal pores  many are almost transparent  eight "comb rows" of fused cilia arranged along the...

Phylum: Ctenophora (Acnidaria) NEPŔHLIVCE/REBROVKY  belong to Diblastica  radially or biradial symmetrical  marine  carnivorous  body contains an internal cavity, a mouth and anal pores  many are almost transparent  eight "comb rows" of fused cilia arranged along the sides of the animal  colloblasts  haven´t got larval stage of development Members of ctenophora: Beröe ovata Venus´ belt (Cestum veneris) 3. FLATWORMS (PLATHELMINTHES) PLOSKAVCE GENERAL CHARACTERISTIC  belong to: Triblastica – not well developed mesoderm  Schizocel  Acelomata  Flattened body  bilaterally symetrical body  Unsegmented body  free living or parasitic  parasitic have hooks and suckers on some parts of body GENERAL CHARACTERISTIC  Integumentary system:  Epidermis (single layer)  Cilia (movement)  Cuticle (protection)  Muscular system:  longitudinal, circular and oblique  Digestive system  one openning of digestive system, branched gut BODY SYSTEMS  Respiratory system: none, diffusion  Circulatory system: none  Excretory system – protonephridium (flame cell + channel)  Nervous system: gangliated  Sensory system:  Simple eyes – ocelli  Statocyst - balance  hermaphrodites, indirect development PROTONEPHRIDIUM CLASSES LATIN SLOVAK TURBELLARIA PLOSKULICE TREMATODES MOTOLICE CESTODES PÁSOMNICE A. CLASS TURBELLARIA (PLOSKULICE)  free living, in water  sometimes coloured  high regenerative capacity – asexual reproduction  Herbivores or predacious  Dendrocoelum lacteum (ploskuľa mliečnobiela) B. CLASS TREMATODES (MOTOLICE)  Ecto-/endoparasites  1-30 mm  oral and ventral suckers  no cilia  hermaphrodites  Common liver fluke (Fasciola hepatica/motolica pečeňová) LIFECYCLE OF A COMMON LIVER FLUKE C. CLASS TAPEWORMS (CESTODES/ PÁSOMNICE)  Endoparasites  Length: up to 20m  Body: scolex + neck + proglottids – up to 1 500 segmets  On head hooks and suckers, no mouth  Hermaphrodites  Can produce toxins REPRESENTATIVES  Beef tapeworm (Taenia saginata/pásomnica dlhá)  human intestine,  10 m  no hooks  intermediate host: catttle  Pork tapeworm (Taenia solium/pásomnica venčeková)  Human intestine  8m  Has hooks  Intermediate host: pig LIFE CYCLE OF A PORK TAPEWORM THANK YOU FOR YOUR ATTENTION