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The wind blew shrill from o'er the hili,    And shook his scanty rags; Whilst cold and sleet benumbed his feet,    As plodding o'er the flags.

Notice that all the vessels leave and enter the kidney at the hilus.

E'en so the tide of empire flows—           Ho! boys, hili ho!

The hollow or concave side of the kidneys is turned inwards, and the deep fissure of this side, known as the hilus, widens out to form the pelvis.

Through the hilus the renal artery passes into each kidney, and from each hilus passes outwards the renal vein, a branch of the inferior vena cava.