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9 Cards in this Set

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  • Back
Characteristics of Animals
eukaryotes, multicellular, heterotrophs, internal digestion, no cell walls, store excess carbohydrates as glycogen, must move at some point during lifetime, classified by tissue layers
Three tissue layers
Ectoderm, mesoderm, endoderm
1.ectoderm
2.mesoderm
3.endoderm
1.outer, gives rise to skin/integument
2.middle, gives rise to muscles and organs
3. inside, linings of organs/guts/respiratory tract
cephalization
development of a head
Two types of symmetry
Radial, bilateral
1. Radial symmetry
2. Bilateral symmetry
1. cut any way and get two symmetrical halves
2. can only cut one way to get two halves
coelom
body cavity surrounded by mesoderm (to develop organs)
(acoelomate, pseudocoelomate, coelomate)
Protostomes
blastopore becomes mouth, have spiral cleavage, determinate cells, schizocoelus(mesoderm splits and rips open to form cavity)
(annelida, mollusca, arthropoda)
Deuterostomes
blastopore becomes anus, radial cleavage, indeterminate cells, outpocketings form from inside mesoderm
(echinodermata, chordata)