Cell movements in morphogenesis of hydroid polypes.
D000818:Animals; D001485:Basement Membrane; D002465:Cell Movement; D003063:Cnidaria / Q000254:growth & development*; D004475:Ectoderm / Q000166:cytology; D004548:Elasticity; D004847:Epithelial Cells; D004848:Epithelium / Q000254:growth & development; D009024:Morphogenesis; D009040:Motion Pictures; D013997:Time Factors