更多preoral例句

1. The cilia of the preoral and postoral bands are not clearly differentiated at this stage.
2. At the anterior end of the preoral lobe is a nervous thickening of the ectoderm called 226 the apical plate .
3. Prostomium: The region in front of the mouth; the preoral part of the head.
4. To the right of this adoral zone is a single line of preoral cilia.