Which structure is the kidney's entry and exit site?

1. Vessels, nerves and the ureter all pass here. 2. It is a single named gateway. 3. The renal hilum is the entry and exit site for structures servicing the kidneys. 4. So the answer is the renal hilum. _Source: OpenStax 'Anatomy and Physiology 2e', Ch 25 'The Urinary System'_