The color of the human kidney is ...... .

Which of the following structures are situated in the cortical region of the kidney?
$I.$ Malpighian corpuscle
$II.$ $PCT$ (Proximal Convoluted Tubules)
$III.$ $DCT$ (Distal Convoluted Tubules)
$IV.$ Loop of Henle
$V.$ Collecting duct

The diagram of a nephron is given below. Which of the following structures together form the renal corpuscle (Malpighian body)?

Where are podocytes found?

$A :$ Kidneys are retroperitoneal in position.
$R :$ Kidneys are covered with peritoneum only on the ventral surface.

What is the difference between an afferent arteriole and an efferent arteriole?