Animals Basic reference: Chapters 32 - 35 Taxonomy: Kingdom Animalia contains well over 30 phyla...
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![Page 1: Animals Basic reference: Chapters 32 - 35 Taxonomy: Kingdom Animalia contains well over 30 phyla basic categories: invertebrates - animals without a.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649e9e5503460f94b9f6ce/html5/thumbnails/1.jpg)
Animals
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Animals
Basic reference: Chapters 32 - 35
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Taxonomy: Kingdom Animalia contains well over 30 phyla basic categories:
invertebrates - animals without a backbone
vertebrates - animals with a backbone
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Comparison of numbers…..
Invertebrates (99%)
Vertebrates (1%)
We’re in the minority!!
While vertebrates tend to be larger animals, there are many more species of invertebrates!!
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Studying Animal Groups…..
Typical animal characteristics
Review of symmetry
Review of invertebrate groups
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Typical Characteristics of Animals
heterotrophs have mobility by way of muscle cells multicellular cell features:
• eukaryotic• diploid (with haploid sex cells)• flexible cells that lack cell walls• most have cells arranged into tissues• property of cell recognition
ingest (eat), then digest their food most reproduce sexually
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most form a blastula during early development, with later development of 3 primary (germ) tissue layers
(p. 625)
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most have a definite body plan
*** Structure is related to lifestyle and function.
symmetry - arrangement of body parts(see p. 624)
Kinds of symmetry:• asymmetrical• radial symmetry• bilateral symmetry
have dorsal and ventral surfaces have anterior and posterior ends show cephalization - concentration of nervous tissue
at the anterior end of an organism
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Nature of the Coelom
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Kinds of symmetry?
Identify each of the following organisms as to their symmetry:
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Porifera Examples: sponges
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Cnidaria Examples: jellyfish, hydra, sea anemones, and corals
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Platyhelminthes (flatworms)
Examples: planarian, tapeworms, and flukes
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Nematoda (roundworms) Examples: nematodes, Ascaris, Necator (hookworm), and
Trichinella
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Rotifera
Examples: rotifers
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Mollusca Examples: clams, snails, oysters, octopuses, and
cuttlefishes
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Annelids Examples: earthworms and leeches
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Arthropoda Examples: insects, arachnids, crustaceans
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Echinodermata
Examples: sea stars, sea urchins, and sand dollars
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Invertebrate chordates Examples: tunicates and lancelets
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