Ownclasses
Give the term for the following
i. Hairpin shaped loop
ii Straight tube into which many DCT of nephrons open. 
iii. Conical masses projecting into the calyces.
iv. Renal columns between the medullary pyramids 
Answer
i. Henle's loop
ii. Collecting duct.
iii.Medullary pyramids.
iv. Columns of Bertinin