Which of the following helps to produce urine in humans and other mammals?
A B C D
bladder urethra kidneys ureter
Question: Which of the following helps to produce urine in humans and other mammals?
(A) bladder
(B) urethra
(C) kidneys
(D) ureter

Answer: (C) kidneys
Answer: (B) urethra
Question: Which of the following helps to produce urine in humans and other mammals?
(A) bladder
(B) urethra
(C) kidneys
(D) ureter
Answer: (C) kidneys