Multiple choice Which among the following statements does NOT characterise kidneys? The cortex extends into the medulla as renal column of Bertin. The inner region of kidney is termed as renal medulla. The nephrons are held together by connective tissue. The position of kidneys is symmetrical. The kidneys are placed against the back wall of the abdominal cavity. Reveal answer Fill a bubble to check yourself D Correct answer Explanation The kidneys are covered by the peritoneum in the front and on the side and they rest against the abdominal muscles. Their position is slightly asymmetrical, the left kidney being a little higher than the right.