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eukaryotic
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multicellular
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lack cell wall
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heterotrophic
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mostly sex reprod
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diverse & complex developmental strats
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- gastrulation, symmetry, germ tissue
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ectoderm
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outermost covers embryos surface
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endoderm
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innermost, digestive tube
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mesoderm
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middle, connective tissues
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combine morphological, molecular, fossil data
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~ 35 animal phyla
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body plan
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set of morphological and developmental traits
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symmetry, tissues, body cavaties
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coelomate
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true coelom
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pseudocoelomate
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"fake" coelom
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acoelomate
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no coelom
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animals share a common ancestor
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sponges are basal animals
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eumetazoa clade with true tissues
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most animals are bilaterians
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- 3 clades
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cleavage
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rapid cell division in zygotes
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blastula
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embryonic stage of multicellular hollow ball from cleavage
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gastrula
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embryonic stage of dif. tissue layers created thru gastrulation
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blastopore:
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opening on embryo.. usually becomes anus
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PROTOSTOMY
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DEUTEROSTOMY
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mouth first
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anus first
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sprial determinate
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radial inderterminate
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molluscs
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chordates
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bottom 8
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middle 3
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Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
