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Invertebrate Animal
Invertebrate animals are animals that do not have a backbone (or any bone tissue)
Invertebrate Animal
Invertebrates live just about anywhere- frozen tundra- tropical rain forest- desert- water
Invertebrate Animal
The fact that invertebrates do not have a backbone seems to limit their size
Ocean dwelling invertebrates can be quite large
Sponges
• Poriferans – having many pores1) Sessile – do not move2) Made up of a collection of cells3) Feed continuously on plankton
and tiny organismsReproduces:
asexually – buds break offsexually – fertilized eggs become larva
Cnidarians
• Central body cavity1) Have tentacles2) Have nematocysts (stinging cells with a barbed
filament)3) Food enters and waste exits through same
openingReproduces: sexually – larvae
asexually -buds
Worms• 3 types of tube shaped organisms– Take in oxygen through their skin1) Flatworms – simple body structures2) Roundworms – have body systems; decomposers3) Annelids – segmented, simple organ systemsReproduce sexually and asexually; have male and female parts
Mollusks
• Soft bodied1) Many have shells2) Have a muscular foot3) Have a mantle (layer of folded skin for
protection)
Echinoderms
• Spiny skinned1) Exoskeleton2) Have skeleton-like plates3) Have tube feet
Star fish
Sand DollarSea Urchin Shell
Arthropods
• Jointed legs1) Exoskeleton that molt2) Generally has head, thorax, abdomen3) Has open circulatory system (no blood vessels)
Class: Insects
1) Have 3 pairs of legs2) Reproduce sexually3) Undergo metamorphosis
(larva pupa adult)
Video
Class: Crustaceans
1) 3 pair of legs, 2 pair of sensory antennae2) Open circulatory system3) Reproduce sexually
Millipedes, Centipedes
1) Long segmented bodies2) Millipedes have 2 pairs of legs per segment3) Centipedes have 1 pair of legs per segment