Henle’s loops are found in those animals which excrete hypertonic urine. One of the following does not have Henle’s loop
Birds
Mammals
Frogs
Reptiles
What is correct for a kidney of an adult human?
Width $-$ Length $-$ Thickness
Which one of the following is not a part of a renal pyramid ?
.......... is absent or highly reduced in cortical nephrons
Draw, neat and labelled diagram of human excretory system.