How do human kidneys look?

Answer 1

Human kidneys are bean-shaped organs, typically about the size of a fist, with a smooth, reddish-brown appearance. They have a convex outer surface and a concave inner surface, known as the hilum, where blood vessels and ureters enter and exit. The kidney's outer layer is called the renal cortex, while the inner layer consists of the renal medulla, which contains structures called renal pyramids. Overall, their structure is designed to efficiently filter blood and produce urine.