What are the 4 parts of the Excretory system?,”Kidneys, Ureters, urinary bladder June 19, 2017 mfadmin Biology Average Rating 0 out of 5 stars. 0 votes.You must log in to submit a review. What are the 4 parts of the Excretory system?,”Kidneys, Ureters, urinary bladder urethra”