Which of the following is $NOT$ a part of the renal pyramid?

Which one of the following correctly explains the function of a specific part of the human nephron?

The origin of the kidney and ureter in $Rana$ $tigrina$ is:

Select the correct sequence of blood flow in the kidney.

How many nephrons are present in each kidney?

In humans,the primary excretory system consists of:
$I.$ Pair of kidneys
$II.$ One pair of ureters
$III.$ Urinary bladder
$IV.$ Urethra
$V.$ Skin
$VI.$ Lungs
$VII.$ Liver