Home ยป Which of the following phyla have nephridia as an excretory structure? Excretory System MCQs Which of the following phyla have nephridia as an excretory structure? January 24, 2022 3 Views Q. Which of the following phyla have nephridia as an excretory structure? A. Arthropods B. Annelids C. Platyhelminthes D. Ctenophora Answer: Annelids