organisms where the mouth develops from the first opening or blastopore
animals without backbones
cells are organized into this
organisms where the anus develops from the first opening and the mouth develops later from another opening
offspring develops as a growth on the body of the parent
parent breaks into pieces and each piece can develop into an adult animal
new organism can regrow from a lost body parti if the part contains enough genetic info
female animal produces eggs that develop without being fertilized
fluid-filled ball of cells
two-cell-layer sac with an opening at one end
irregular shape with no balance in body structure
can be divided along any plane, through a central axis, into roughly equal halves
can be divided into mirror image halves only along one plane through the central axis
head end of an animal
tail end of an animal
backside of an animal
underside of an animal
body cavity that has tissue formed from the mesoderm
do not have a coelom
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