iliolumbar vein in dogs

The iliolumbar vein is the vena comitans of the iliolumbar artery. The obturator nerve crosses superficial to it. A single vein is found more commonly than a double vein. It drains vertebral segments four and five. It is closely related to the ascending lumbar vein. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the iliolumbar vein is

The iliolumbar vein is the vena comitans of the iliolumbar artery. The obturator nerve crosses superficial to it. A single vein is found more commonly than a double vein. It drains vertebral segments four and five. It is closely related to the ascending lumbar vein. [WP,unvetted]. The atlas records it as a vein at the organ scale in the dog.

Where the iliolumbar vein is

It sits within the cardiovascular system. Only the system is known. The position shown carries almost no spatial information.

What the iliolumbar vein connects to

The atlas records 4 typed relationships for it, across 4 kinds of connection. a kind of vein.

Supply and innervation

Venous drainage: internal iliac vein.

Also called

Also recorded as ilio-lumbar vein and vena iliolumbalis. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001320, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

Questions

Where is the iliolumbar vein?

It sits within the cardiovascular system. Only the system is known. The position shown carries almost no spatial information.

What does the iliolumbar vein connect to?

A kind of: vein.

Is the iliolumbar vein the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.