    Sentence 1 What are the most active parts of ctenophora?    Sentence 2: These branch through the mesoglea to the most active  parts of the animal: the mouth and pharynx; the roots of the  tentacles if present; al along the underside of each comb row; and  four branches round the sensory complex at the far end from the  mouth ~ two ofthese fur branches terminate in anal pores.