Which of the following is not part of renal tubules?

Each nephron has two parts:

A. Glomerulus: It is a tuft of capillaries in Bowman's capsule.

Renal artery $\to$Afferent arteriole (a fine branch of the renal artery) $\to$Glomerulus $\to$ An efferent arteriole.

B. Renal tubule: It is divisible into

• Bowman's capsule: It is a double-walled cup-like structure enclosing the glomerulus. Malpighian body (or Renal corpuscle) consists of glomerulus and Bowman's capsule.
• Proximal convoluted tubule (PCT)
• Henle's loop
• Distal convoluted tubule (DCT)
• Collecting duct