How many of the given statements are correct with respect to human urinary system?
(a) In humans, ammonia produced by metabolism is converted into urea in the kidneys and then excreted out by them.
(b) The outer layer of kidney is a tough capsule.
(c) Inside the kidney, there are two zones, an outer medulla and an inner cortex.
(d) The cortex extends in between the medullary pyramids as renal columns called columns of Bertini.
(e) In kidney, there is a broad funnel-shaped space called the renal pelvis with projections called calyces.
1. Five
2. Three
3. Four
4. Two