The excretory system in mammals consists of the following parts except? by Sunday | Dec 7 | Biology WAEC | 0 comments A. two kidneys B. two ureters C. two bladders D. one urethra Correct Answer: Option C C. two bladders Users Also Read These:A circulatory system is very essential in mammals…Which of the reproductive system in mammals secretes…SS2 First Term Biology Lesson Note – Excretory System IWhich of the following structures functions as an…The blood circulatory system of vertebrates consists of?