Select the correct dimensions for the human kidney (Length,Width,Thickness).

In some of the nephrons,the loop of Henle is very long and runs deep into the medulla. These nephrons are called:

Which of the following blood vessels contains the minimum concentration of urea in the blood?

The functional and structural unit of the kidney is ........ .

The main function of the renal pyramids of the kidney is to:

Choose the incorrect sentence$(s)$.
$(I)$ Malpighian corpuscles,$PCT$ and $DCT$ of the nephron are situated in the medulla of the kidney.
$(II)$ The loop of Henle dips into the medulla.
$(III)$ In juxtamedullary nephrons,the loop of Henle is too short and extends very little into the medulla.
$(IV)$ Vasa recta is absent or highly reduced in cortical nephrons.