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Related Flashcards
Cards In This Set
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What properties make an organism an animal, not another kingdom?
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Characteristics: heterotrophic, multicellular (with specialization), at least one mobile stage
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What are porifera?
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Sponges, lowest form of animal, no real organs or locomotion
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Cnidaria?
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Blind gut, two cell layers (endo/ectoderm); e.g. jellyfish, coral
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Ctenophora
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Radial symmetry, diffuse nerve net, incomplete gut; ecto/endoderm, something like mesoderm
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What are protostomes?
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First opening in body is mouth
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What are deuterostomes?
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First opening in body is anus; DPAM; coelom originates from outpouching of gut; all are coelomates
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Which phylogenies have radial symmetry?
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Echinodermata, cnidaria, ctenophora
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Three coelom types?
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Coelomates, pseudocoelomates, acoelomates
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What is the advantage of being a coelomate?
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Motor control of internal organs independent of outer wall; digestion
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Characteristics of acoelomates?
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First excretory system, reproductive organs, brain ganglion; e.g. tapeworms
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Characteristics of pseudocoelomates?
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Multiorgan digestive system; rotifers, C. elegans
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Coelomates?
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Molluscs, annelids
mantle with large cavity for breathing/excretion |
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Arthropod characteristics?
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Ventral nerve cord, chitin exoskeleton, well-developed photoreceptors
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Echinoderms?
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Radial symmetry but bilateral symmetry for larvae; e.g. sea stars
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What are hemichordata?
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Water in mouth, out pores, like early gills, extract oxygen and filter food; acorn worms
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