Animal Kingdom - Woodstown-Pilesgrove Regional School ...

Animal Kingdom - Woodstown-Pilesgrove Regional School ...

Animal Kingdom Invertebrate Phylum Animal Kingdom characteristics

Eukaryotic Heterotrophic Multicellular Most sexual reproduction, asexual = budding, fragmentation No cell walls Symmetry Asymmetry

Radial symmetry Bilateral symmetry Porifera The sponge

Asymmetric Cell level of organization Cool characteristics:

Choanocytes Amoeboid cells Spicules/spongin Mostly Asexual reproduction sessile Cnidarians anthozoa, hydrozoa, scyphozoan

Symmetry - radial Tissue layer of organization Gastrovascular cavity Cool characteristics

Mesoglea Cnidocytes, nematocysts 2 body forms: polyp and medusa Nemertea and Platyhelminthes Ribbon worms and flatworms

Bilateral symmetry Gastrovascular cavity Sensory cells Level of organization? Cool characteristics

Proboscis apparatus Free living or parasitic flatworms Cephalization Gas exchange through diffusion Benefits of coelom body cavity

Freer body movements outer wall independent of gut Ample space allows for growth of organs Fluid protects organs from damage Storage for reproductive, digestive wastes

prior to being expelled Hydrostatic skeleton muscle contraction against fluid in cavity Nematoda and Rotifera Roundworms and rotifers

Bilateral Symmetry Pseudocoelomates Cool characteristics parasitic roundworms Ascaris, Trichinella, filarial worms dogs (heartworm) humans (elephantiasis) Crown of cilia corona, locomotion

Protostomes Deuterostomes Mulluscs, annelids, arthropods Spiral and determinate cleavage Blastopore is mouth Coelom forms by a splitting of the


Echinoderms and chordates Radial and indeterminate Blastopore is anus Coelom forms by outpocketing of primitive gut Mollusca

mulluscs Bilateral Symmetry Coelomates Cool characteristics

3 part body plan (mantle, foot, visceral mass) Open circulatory system in most 3 main classes Bivalves Gastropoda cephalopoda

Annelids Segmented worms Bilateral Symmetry Segmentation

Digestive system with specialized regions Cool characteristics Marine worms, earth worms and leeches Setae bristles that anchor the worm hermaphroditic Arthropods

Jointed appendages Bilateral Symmetry Cool characteristics

Exoskeleton of chitin, molt Segmentation is modified for specialization Well developed nervous system Variety of respiratory organs Metamorphosis complete/incomplete Echinoderms Spiny skin

Symmetry radial-(adults) and bilateral-(larvae) Cool characteristics Primarily bottom dwellers

Larvae are free swimming filter feeders with bilateral symmetry Endoskeleton made of spiny calcium rich plates called ossicles Water vascular system - locomotion

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