The periproct is the final body segment in annelid worms. The anus is located on this segment. [1] The term also refers to the small region surrounding the anus of the sea urchin. [2]
The periproct is the final body segment in annelid worms. The anus is located on this segment. [1] The term also refers to the small region surrounding the anus of the sea urchin. [2]