............ cells of Bowman's capsule called .......... are arranged in an intricate manner so as to leave some minute spaces called slit pores.

The color of the human kidney is ...... .

The wide funnel-shaped space inside the hilum of the kidney is called the .....

Renal pyramids are parts of the ...... .

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.

The renal columns of Bertin are extensions of the ...... into the renal medulla.