Sentence 1: In some species , the withdrawn invert and lophophore are protected by an operculum ( `` lid '' ) , which is closed by muscles and opened by fluid pressure .
Sentence 2: In some species the retracted invert and lophophore are protected by an operculum ( `` lid '' ) , which is closed by muscles and opened by fluid pressure .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?