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…SS2 Biology Lesson Note on Excretory SystemThe blood circulatory system of vertebrates consists of?Each neurone consists of the following structures except?The autonomic nervous system consists of neurons…