Kingdom Animalia Flashcards
Phylum Porifera
Sponges Invertebrate Asymmetrical Lack true tissue/organs Sessile. Support: spicules, spongin Osculum = opening for filtration Spongocoel (central cavity) with choanocytes = pull in H2O for food collection
Phylum Cnidaria
Diploblastic Radial symmetry Gastrovascular cavity (food digestion) No gills Cnidocytes with nematocysts Three classes: Hydrozoa, Scyphozoa and Anthozoa
Cnidocytes
Stinging cells containing nematocysts
Nematocysts
Stinging organelles
Class Hydrozoa
Polyps and medusae
Marine and freshwater
Hydra
Portuguese man-o-war (Physalia physalis)
Class Scyphozoa
True jellies
medusa stage only
marine and fresh water
moon jelly (Aurelia aurita)
Class Anthozoa
Corals
Sea anemones
marine only
polyp stage only
Phylum Ctenophora
Comb jellies Invertebrate Diploblastic Biradial symmetry 8 rows of comb like plates (cilia) Planktonic Marine, predatory, simple nervous system, no nematocysts (but can steal them)
Phylum Platyhelminthes
Flatworms Three Classes: Trematoda, Cestoda and Turbellaria Invertebrate Triploblastic Bilateral Acoelomate Protostome One digestive opening (incomplete digestive tract) No respiratory system Free-living or parasitic
Class Trematoda
Flukes
Parasitic
Complex life cycles (multiple hosts)
Class Cestoda
Tapeworms
Intestinal parasites with proglottids and scolex
Class Turbellaria
Flatworms (Degusia) Freshwater and marine Moist environments Planaria 2 eyespots and 2 auricles
Phylum Rotifera
Rotifers Invertebrate Triploblastic Bilateral Pseudocoelomate Protostome Freshwater, marine, interstitial Complete digestive tract 4 regions: head, neck, trunk, foot Corona: draws water in for feeding Cryptobiosis: survive long periods in unfavorable conditions
Phylum Nemotoda
Nematodes, roundworms (Ascaris) Invertebrate Triploblastic Bilateral Pseudocoelomate Protostome Free-living and parasitic Complete digestive tract Cuticle Lateral line
Phylum Mollusca
2nd largest phylum Most complex phylum Four classes: Polyplacophora, Gastropoda, Bivalvia, Cephalopoda Invertebrate Triploblastic Bilateral Eucoelomate Protostome Usually well developed head Some with advanced vision Complete digestive tract Radula (scraping) All have: foot, shell, mantle, visceral mass
Class Polyplacophora
Chitons
8 plates on shell
Curl into ball
Class Gastropoda
Snails, slugs, etc
Most abundant
Torsion during development
Operculum (protection)
Class Bivalvia
Oysters, mussles, clams, etc
Hinged shell (umbo)
Siphons
No radula
Class Cephalopoda
Nautilus, cuttlefish, squid, octopus Most advanced Tentacles Most lack external shells Well developed nervous system with large brain Advanced vision Beaks Closed circulatory system
Phylum Annelidia
Earthworms Two Classes: Oligochaeta and Polychaeta Invertebrate Bilateral Eucoelomate Protostome Segmented Setae/parapodia Closed circulatory system
Class Oligochaeta
Earthworms (Lumbricus)
No parapodia
Few setae
Marine, terrestrial, freshwater