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Chapter 9 lesson 3

vocabulary

TermDefinition
bilateral symmetry the arrangement of body parts in such a way that there is only one way to cut the body in two identicle halves.
dorsal billeterilly symmetrical animals have a back, or dorsal opening.
posterior billerteraly symmetrical animals, including humans have a front end or nterioior or a rear end posterior.
ventral the belly
anterior billerteraly symmetrical animals, including humans have a front end or nterioior
mesoudern in developing embryos in the middle layer of tissue , the mesoudern
Created by: rache356
 

 



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