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Level of Organization Cellular Tissue Organ P Porifera sponges Organ Organ System P Chordata P Cnidaria C Hydrozoa hydra fire coral man o war C Anthozoa sea anemones sea fans sea pansies C Scyphozoa jellies C Staurozoa C Cubozoa box jellies P Platyhelminthes flat worms C Turbellaria planaria C Trematoda flukes C Cestoda tapeworms P Nemertea ribbon worms P Nematoda P Rotifera P Ectoprocta Bryozoa P Annelida segmented worms C Polychaeta marine worms C Oligochaeta earthworms C Hirudinea leeches P Arthropoda II P Arthropoda S P Trilobitomorpha trilobites SP Chelicerata C Merostomata horseshoe Crab C Arachnida mites ticks spiders scorpions SP Crustacea C Branciopoda brine shrimp C Ostracoda seed shrimp C Copepoda Cyclops C Cirripedia barnacles C Malacostraca crabs shrimp lobsters cray fish rolly pollies P Mollusca C Gastropoda Sc Prosobranchia Sc Opisthobranchia Sc Pulmonata C Bivalvia clams C Cephalopoda squids C Polyplacophora C Scaphopoda Embryonic Development P Porifera no tissues organs mesohyl P Cnidaria triploblastic mesoglea Acoelomate Pseudocoelomate Eucoelomate Protostomes schizocoelous spiral cleavage determinate P Nematoda P Rotifera P Ectoprocta Bryozoa P Platyhelminthe s flat worms C Turbellaria planaria C Trematoda flukes C Cestoda Tapeworms P Nemertea ribbon worms Eucoelomate Deuterostomes entercoelous radial cleavage indeterminate P Echinodermata C Echinoidea urchins sand dollars C Holothuroidea sea cucumbers C Ophiuroidea basket stars brittlestars snake stars C Asteroidea sea stars starfishes C Crinoidea Feather stars sea lilies P Chordata SP Urochordata sea squirts tunicates SP Cephalochordata P Annelida segmented worms C Polychaeta marine worms lancelets SP Vertebrata C Agnatha C Chondrichthyes cartilaginous fish rays sharks C Osteichthyes bony fish contains lobe finned and ray finned fish C Amphibia frogs C Reptilia c Testudines turtles terrapins tortoises c Lepidosauria lizards snakes c Archesauria dinosaurs birds crocodiles C Mammalia C Oligochaeta earthworms C Hirudinea leeches P Arthropoda I S P Trilobitomorpha trilobites SP Chelicerata C Merostomata horseshoe Crab C Arachnida mites ticks spiders scorpions SP Crustacea C Branciopoda brine shrimp C Ostracoda seed shrimp C Copepoda Cyclops C Cirripedia barnacles C Malacostraca crabs shrimp lobsters cray fish rolly pollies P Arthropoda II SP Myriapoda C Chilopoda centipedes C Diplopoda millipedes SP Hexapoda C Insecta Sc Apterygota silverfish Sc Ptyergota with wings d Exopterygota o Odonata dragonflies damselflies o Orthoptera grasshoppers crickets cockroaches o Isoptera termites o Himeptera true bugs bed bugs stink bugs assassin bugs o Homoptera cicadas aphids leaf hopper d Endopterygota o Coleoptera beetles fireflies weevils grubs o Lepidoptera butterflies moths caterpillars o Diptera true flies o Hymenoptera ants bees wasps P Mollusca C Gastropoda Sc Prosobranchia Sc Opisthobranchia Sc Pulmonata C Bivalvia clams C Cephalopoda squids C Polyplacophora C Scaphopoda Symmetry Asymmetric P Porifera P Chordata SP Urochordata ONLY Radial Bilateral P Cnidaria P Platyhelminthes Bilateral Pentamerous Radial P Echinodermata Tertiary Bilateralism P Echinodermata C Holothuroidea ONLY P Nemertea P Nematoda P Rotifera P Ectoprocta bryozoa P Annelida P Arthropoda P Mollusca P Chordata Skeleton Support P Porifera P Cnidaria P Platyhelminthes P Nemertea P Nematoda P Rotifera P Ectoprocta Bryozoa P Annelida P Arthropoda I P Arthropoda II P Mollusca C Bivalvia C Gastropoda Sc Prosobranchia Sc Opisthobranchia Sc Pulmonata C Scaphopoda C Polyplacophora C Cephalopoda Squid Spicules silicone or calcium Spongin collagen Spongocoel Hydrostatic Skeleton mesoglea Mesenchyme Mesenchyme Hydrostatic Skeleton mesenchyme psuedocoelom Hydrostatic Skeleton coelom Jointed exoskeleton Ecdysis Exoskeleton Metamorphosis Shell split into 2 valves connected by adductor muscle Calcareous shell secreted from mantel All have shell except slugs Shell is ventrally fused into a tusk Shell comprises 8 overlapping plates Reduced or lost shell Shell is internal pen P Echinodermata P Chordata Cuttlefish Octopus SP Urochordata SP Cephalochordata SP Vertebrata C Agnatha C Chondrichthyes C Osteichthyes C Amphibia C Reptilia C Aves C Mammalia Shell is internal bone No shell Dermal endoskeleton Axial Skeleton Appendicular skeleton Cartilaginous endoskeleton without bony jaws Cartilaginous endoskeleton with bony jaws Bony endoskeleton Bony skeleton Bony Skeleton Ossified Skeleton Bony skeleton Sensory Nervous Nerv e Net Nerv e Ladd er Nerv e Ring Dorsal Ventral nerve cords Cerebr al Gangli a Papilla e senso ry Pits Ocell i eye spot s Auricles chemorecept ors Eyes Antenn ae Dorsal hollow nerve cord and notocho rd X x X x x x X X x Porifera Cnidaria Platyhelmint hes Nemertea Nematoda Rotifera Ectoprocta bryozoa Annelida Arthropoda I Arthropoda II Mollusca Echinoderm ata Chordata X x x x x x x x both both Ventral ventral Ventral Pair Ventral to foot Pair dorsal to visceral mass x x x x Cephalop ods x x x Incomplete Digestion P Cnidaria P Platyhelminthes Intracellular Digestion P Porifera Digestion Complete Digestion P Nemertea P Nematoda P Ectoprocta bryozoa P Annelida P Arthropoda P Mollusca P Echinodermata EXCEPT Ophiuroidea P Chordata Feeding Structures P Porifera P Cnidaria P Platyhelminthes P Nemertea P Nematoda P Rotifera C Hydrozoa C Anthozoa C Scyphozoa C Turbellaria C Trematoda C Cestoda Suspension filter feeders GVC Cnidocytes stinging cells to capture prey Feeds on prey Parasite Parasite Proboscis stylet in rhynchocoel Parasitic Trilobe esophagus Mouth Corona water current P Ectoprocta Bryozoa P Annelida P Arthropoda P Mollusca P Echinodermata P Chordata C Polychaeta C Oligochaeta C Hirudinea SP Trilobitomorpha SP Chelicerata C Merostomata C Arachnida C Pycnogonida SP Crustacea C Branchiopoda C Ostracoda C Copepoda C Cirripedia C Malacostraca C Bivalvia C Cephalopoda C Polyplacophora C Scaphapoda SP Urochordata SP Cephalochordata C Agnatha Trophi teeth Mastax pharynx Lophophore retractable tentacles fouling Ebersible pharynx esophagus jaws Muscular pharynx gizzard typhlosole parasitic Predators Predators Predators Predators Predators Filter feeders Filter feeders Filter feeders Filter feeders predators Filter Feeders Predators radula Pedicellariae jaw like spines Cardiac stomach ebersible Pyloric stomach Filter Feeder Gills for feeding No jaws Excretory Osmoregulation P Porifera P Cnidaria P Platyhelminthes P Nemertea P Nematoda P Rotifera P Ectoprocta


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FSU BSC 2011L - Level of Organization

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