Multiple choice Which of the following statements is incorrect regarding kidneys? The kidneys are the main excretory organs. Each kidney is bean-shaped and located in the abdomen. Kidneys are present one on either side of the backbone. The right kidney is placed a little higher than the left kidney. Function of kidney is also to regulate pH of the blood. Reveal answer Fill a bubble to check yourself D Correct answer Explanation This statement is incorrect. It is the left kidney that is placed a little higher than the right kidney. Yes, apart from removing the poisonous substances such as urea and other wastes from blood, this is another function of the kidney.