The kidney of an adult rabbit is .............

In the given diagram,choose the correct option for the labelled parts $:-$

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.

Choose the correct option:
$(1)$ $ANF$ is secreted when blood pressure decreases / blood pressure increases.
$(2)$ Renal pyramids are located in the renal cortex / renal medulla.

Provide definitions/explanations for the following terms:
$(1)$ Calyces
$(2)$ Renal pyramids

Henle's loops are found in those animals which excrete hypertonic urine. One of the following does not have Henle's loop.