Origin of preoral
Examples from the Web for preoral
Historical Examples of preoral
Prostomium: The region in front of the mouth; the preoral part of the head.The Sea-beach at Ebb-tide
Augusta Foote Arnold
To the right of this adoral zone is a single line of preoral cilia.Marine Protozoa from Woods Hole
Gary N. Calkins
The cilia of the preoral and postoral bands are not clearly differentiated at this stage.
At the anterior end of the preoral lobe is a nervous thickening of the ectoderm called 226 the apical plate .