CHAPTER 33 INVERTEBRATES

Porifera Sponges

Porifera Sponges

Porifera Sponges-osculum, choanocytes-limits size of food particles , must fit into the collar; extra cellular and intracellular digestion amoebocytes, hermaphrodites, reaggregation, spongocoels

Porifera Sponges

Porifera Sponges

Venus Flower Basket Sponge

Porifera Sponges

Porifera Sponges

Spicules-skeletal components of sponges

composed of calcium carbonate, silica, or a protein called spongin

Porifera Sponges

Cnidarians-hydra and jellyfish

Cnidarians-hydra and jellyfish

Cnidarians-hydra and

jellyfishnerve net

nonpolarizedPolyp

Medusa

Cnidarians-hydra and jellyfish

cnidocytes with nematocysts

Nematocyst

Cnidarians-colonial hydra Hydrozoansectoderm, endoderm, radial symmetry, polyps, medusa, cnidocytes with nematocysts

Cnidarians-jellyfish Scyphozoans

Cnidarians-jellyfish

Cnidarians-sea anemone Anthozoans

Cnidarians-sea anemone Anthozoans

Cnidarians-sea anemone

Anthozoans

Cnidarians-Coral Anthozoans

Cnidarians-corals Anthozoans

Cnidarians-coral Hydorzoan

Cnidarians-Scyphozoansjellyfish

Cnidarians-hydra

Colonial hydroid

Cnidarians-sea anemone Anthozoans

Cnidarians-Hydrozoan-Portuguese Man-of-War

Cnidarians-Hydrozoans-Portuguese Man-of-War

Cnidarians-Hydrozoan-Portuguese Man-of-War

Ctenophora-comb jellies-long tentacles, combs are rows of fused cilia, some are bioluminescent colloblasts-cells containing vacuoles with a sticky thread-like protein that burst open and captures food particles

Ctenophora-comb jellies

Ctenophora-comb jellies

Ctenophora-comb jellies

Ctenophora-comb jellies

Ctenophora-comb jelliesFused cilia

Ctenophora-comb jellies

ProtostomiaAcoelomates

PlatehelminthesPseudocoelomates

RotifersNematoda-ecdysozoa

CoelomatesLophophoratesNemerteaMolluscaAnnelidaArthropoda-ecdysozoa

DeuterostomiaCoelomates

Echinodermata

Platyhelminthes-flatworms

Platyhelminthes-flatworms incomplete digestive system, flame cells water balance only, cephalization, nerves, internal fertilization

Platyhelminthes-flatworms

Life Cycle of a Blood Fluketriploblastic with

mesoderm, acoelomic,

incomplete digestive system, flame cells water balance only,

cephalization, nerves,

Platyhelminthes-flatworms-fluke

Platyhelminthes-flatworms-

tapeworm-Cestoidia

Platyhelminthes-flatworms- tapeworm

Platyhelminthes-flatworms- tapeworm

Platyhelminthes-flatworms- tapeworm

Rotifers-have a pseudocoelom reproduce by parthenogenesis, crown of cilia for food capture pull food into mouth which has jaws, first complete digestive tract

Rotifers

Rotifers

Rotifers

Rotifers

Lophophorates-lophophore-food capture and gas

exchange,embryonic

development like a deuterostomes

phoronid

Lophophoratesbryozoans

Lophophorates Bryozoans

Lophophore

Lophophorates brachiopods

LophophoratesLophophorates

Nemertea-ribbon wormsFirst simple closed circulatory system, complete digestive system

Nemertea-ribbon worms

Nemertea-ribbon worms probosis

worm

Mollusca-foot, visceral mass, mantle, mantle cavity, radula

Mollusca chiton

Mollusca chiton

Trochophore Larva

Protonephridia flame cell metanephridia

Flame cell found in Platyhelminthes pulls in water and pumps it out with cilia no concentration of waste. Protonephridia found in Molluska several flame cells with some transport of good substances out of the tube loses lots of water little concentration of waste

Metanephridia take in coelomic fluid and reabsorb the nutrients and water which are then picked up by the associated blood vessels thus they concentrate the nitrogenous waste found in Annelids

Mollusca gastropoda-torsion-vascularized mantle cavity acts as crude lung

Mollusca gastropoda

torsion-vascularized mantle cavity acts as crude

lung

Mollusca gastropoda

Mollusca gastropoda-sea slug

Mollusca gastropoda

Mollusca gastropoda

Mollusca gastropoda

Mollusca Bivalvia

Mollusca Bivalviagillsfilter feedersopen circulatory systemloss of cephalization

Mollusca Bivalvia

Mollusca Bivalvia

Mollusca Bivalvia

Mollusca Cephalopoda-jet propulsion; closed circulatory system, well developed nervous system

Mollusca Cephalopoda

Mollusca Cephalopoda

Mollusca Cephalopoda

Mollusca Cephalopoda

Mollusca Cephalopoda

Mollusca Cephalopoda

Mollusca Cephalopoda eggs of giant octopus

Mollusca Cephalopoda

Annelida-segmented

worms- Oligochaeta-earthworms

Annelida-segmented

worms- segmentation,

closed circulatory

system, cerebral ganglia

and nerve cords,

metanephridia,

Oligochaeta-earthworms

Annelida-segmented worms-Polychaete Polychaete Hirudinea-marine bristle tube worm leechesworms

Annelida-segmented worms-

Annelida-segmented worms-

Respiration

Porifera->rotifera-Through body surfaceLophophorates through tentacles w/ coelomic fluidAnnelids through highly vascularizedepidermis and parapodiaMolusca through gills or vascularized mantle cavityArachnida book lungsInsecta tracheal system

Annelida-segmented worms-

Hirudinea

Annelida-segmented worms-Oligochaeta

Annelida-segmented worms Polychaeta

Annelida-segmented worms-Hirudinea

Annelida-segmented worms

Annelida-segmented worms

Annelida-segmented worms

Nematoda-roundwormsa free-livingtype

Nematoda-roundworms

Parasitic nematode trichinosis form cysts in pork

Nematoda Roundworms

Nematoda Roundworms

Nematoda Roundworms

Nematoda Roundworms

Nematoda Roundworms

Nematoda Roundworms

Nematoda Roundworms Loa-loa worm

Arthropoda

Trilobite

Horseshoe crabs

Arachnida parasitic mites in a Scorpion honey bee’s trachea

Arthropoda Arachnida

Arthropoda Arachnida

Arachnida

Arachnida

Arachnida

Arachnida

Arachnida

Arachnida

Arachnida

Arachnida

Arachnida

Chilopoda

Chilopoda

Chilopoda

Diplopoda-millipedes

Diplopoda

Diplopoda

Diplopoda

Insecta

Insecta

Insecta-complete metamorphosis

Insecta

Insecta

Incomplete Metamorphosis

Complete Metamorphosis

Crustacean

Crustacean

Crustaceanbarnacles

Crustacea

Crustacea

Crustacea

Echinodermata

Echinodermata

Echinodermata

Echinodermata

Echinodermata

Echinodermata

Echinodermata

Regeneration

Echinodermatasea cucumber