Home ยป Which of the following is not included in the excretory system of humans? Excretory System MCQs Which of the following is not included in the excretory system of humans? January 24, 2022 6 Views Q. Which of the following is not included in the excretory system of humans? A. Cloaca B. Kidneys C. Ureters D. Urethra Answer: Cloaca