Hilum

Overview
A hilum (formerly called a hilus) is a depression or pit at the part of an organ where structures such as blood vessels and nerves enter.

Medial depression for blood vessels and ureter to enter kidney chamber

The adjective form is "hilar", and the plural is "hila".

Examples

 * the hilum of kidney (admits the renal artery, vein, ureter, and nerves)
 * splenic hilum
 * hilum of lung