Which of the following statements is incorrect?

• A
  In most of the nephrons,the loop of Henle is short and extends only a short distance into the medulla.
• B
  In some nephrons,the loop of Henle is very long and extends deep into the medulla.
• C
  The Bowman's capsule and the tuft of capillaries are known as renal corpuscles.
• D
  The bunch of small blood capillaries formed by the afferent arteriole is called the glomerulus.