Invertebrates!!!!!!

Porifera Symmetry: AsymmetricSymmetry: Asymmetric Body Cavity: NONEBody Cavity: NONE Reproduction:Reproduction: –Sexually– hermaphrodites –Asexually– fragmentation Circulation: No organized system, use amobocytes transport nutrients around bodyCirculation: No organized system, use amobocytes transport nutrients around body Digestion: Filter feedersDigestion: Filter feeders Movement:Movement: –Adults are sessile (don’t move) –Free swimming larvae use flagella for movement

Porifera

Cnidaria Symmetry: RadialSymmetry: Radial Body Cavity: NONEBody Cavity: NONE Reproduction:Reproduction: –Sexually– separate sexes –Asexually– budding; polyps become medusae Circulation: No organized system; rely on diffusionCirculation: No organized system; rely on diffusion Digestion: nematocysts (stinging cells); extra cellular digestionDigestion: nematocysts (stinging cells); extra cellular digestion Movement:Movement: –Polyps are sessile (don’t move) –Larvae are covered in cilia and medusae are free- swimming

Cnidaria Sea Nettle Hydra Moon Jelly Brain Coral Staghorn Coral Sea Anemone

Platyhelminthes Symmetry: BilateralSymmetry: Bilateral Body Cavity: AcoelomateBody Cavity: Acoelomate Reproduction:Reproduction: –Sexually– hermaphrodites –Asexually– regeneration Circulation: No organized system; rely on diffusionCirculation: No organized system; rely on diffusion Digestion:Digestion: –Extracellular digestion-- pharynx releases digestive enzymes & sucks digested food in –Parasitic-- absorb predigested food from host Movement:Movement: –Muscle cells respond to impulses from the nervous system

Platyhelminthes Proglottids Scolex Planarian Free Living Marine Flatworm Free Living Marine Flatworm Free Living Marine Flatworm Liver Fluke Parasitic Tapeworm

Nematoda Symmetry: BilateralSymmetry: Bilateral Body Cavity: PseudocoelomateBody Cavity: Pseudocoelomate Reproduction:Reproduction: –Sexually Circulation: No organized system; diffusionCirculation: No organized system; diffusion Digestion: Complete internal digestive tractDigestion: Complete internal digestive tract Movement: muscles that run the length of the bodyMovement: muscles that run the length of the body

Nematoda C. Elegans Pin Worm Heart Worm Ascaris

Annelida Symmetry: BilateralSymmetry: Bilateral Body Cavity: CoelomateBody Cavity: Coelomate Reproduction:Reproduction: –Hermaphrodites –two worms exchange sperm, fertilized egg capsule left in soil –Bristleworms have separate sexes & reproduce sexually – external fertilization) Circulation: Closed, blood contained in vesselsCirculation: Closed, blood contained in vessels Digestion: Complete internal digestive tractDigestion: Complete internal digestive tract Movement:Movement: –Setae – tiny bristles found on each segment –Segmentation (muscles in each segment allow lengthening & shortening of body)

Annelida Earthworm Leech Christmas Tree Worms Bristleworm

Mollusca Symmetry: BilateralSymmetry: Bilateral Body Cavity: CoelomateBody Cavity: Coelomate Reproduction:Reproduction: –Sexually using separate sexes –Hermaphroditic-- land dwellers Circulation: open or closedCirculation: open or closed Digestion: Complete internal digestive tractDigestion: Complete internal digestive tract –Radula – rasping structure used to drill, scrape, cut or grate food –Some are filter feeders Movement:Movement: –Sessile-- oysters, mussels –Free swimming-- octopus, squid –Muscular foot-- clams, snails

Mollusca Octopus Cuttlefish Abalone Snail Nudibranch

Arthropoda Symmetry: BilateralSymmetry: Bilateral Body Cavity: CoelomateBody Cavity: Coelomate Reproduction:Reproduction: –Sexual-- internal & external fertilization –Asexual—Parthenogenesis (Individual develops from unfertilized egg) Circulation: openCirculation: open Digestion: Complete internal digestive tractDigestion: Complete internal digestive tract –Feeding– Mandibles –Excretion– Malphigian Tubes Movement: Appendages (jointed structures that stick out from the bodyMovement: Appendages (jointed structures that stick out from the body

Arthropoda Spider Scorpion Lobster Shrimp Daddy Longlegs Tick Horseshoe Crab Rolly Polly Bee

Echinodermata Symmetry: RadialSymmetry: Radial Body Cavity: NONEBody Cavity: NONE Reproduction:Reproduction: –Sexual– external fertilization Circulation: openCirculation: open Digestion: Complete internal digestive tractDigestion: Complete internal digestive tract –Water Vascular System-- movement, gas exchange, food capture, waste excretion Movement: Tube feet-- hollow tube with suction cup also involved in gas exchange & excretionMovement: Tube feet-- hollow tube with suction cup also involved in gas exchange & excretion

Echinodermata Sea Urchin Sea Star Sea Lilly Sea Cucumber