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:SS2 Biology Lesson Note on Excretory SystemWhich of the following substances is not an…Which of the following peoples can be found in most…SS2 First Term Biology Lesson Note – Excretory System IIEach neurone consists of the following structures except?