Notch in the concave border of the kidney through which the renal artery enters and the renal vein and renal pelvis of the ureter exit

A) hilum
B) cortex
C) medulla
D) afferent arteriole
E) efferent arteriole
F) threshold
G) catheter
H) incontinence
I) dialysate
J) dwell time

Concave Border

A curved or rounded inward border, opposite of convex, which can refer to the shape of objects, structures, or anatomical features.

Hilum

The recessed area of the kidney where the ureter and blood vessels enter.

Renal Artery

A blood vessel that supplies the kidneys with oxygen-rich blood.