Complex sentence: The priapulids are hermaphroditic, and their male and female organs, which are closely associated with the excretory protonephridia, consist of a pair of branching tufts, each of which opens to the exterior on one side of the anus.
Split into simpler sentences: The priapulids are hermaphroditic Their male and female organs are closely associated with the excretory protonephridia. They comprise a pair of branching tufts, each of which opens to the exterior on one side of the anus.