sentence: Many species have a pair of short projections at the rear end.
sentences_before: Gastrotrichs are bilaterally symmetric, with a transparent body and a flat underside.
sentences_after: The body is covered with cilia, especially about the mouth and on the lower surface. Its two end projections have cement glands. Like many microscopic animals, their movement is mainly powered by hydrostatics.
concept_name: specie
headings: Gastrotricha Anatomy
categories: Minor phyla