ejaculatory duct in dogs

The Ejaculatory ducts (ductus ejaculatorii) are paired structures in male anatomy, about 2 cm in length. Each ejaculatory duct is formed by the union of the vas deferens with the duct of the seminal vesicle. They pass through the prostate, and empty into the urethra at the Colliculus seminalis. During ejaculation, semen passes through the ducts and exits the body via the penis[WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the ejaculatory duct is

The Ejaculatory ducts (ductus ejaculatorii) are paired structures in male anatomy, about 2 cm in length. Each ejaculatory duct is formed by the union of the vas deferens with the duct of the seminal vesicle. They pass through the prostate, and empty into the urethra at the Colliculus seminalis. During ejaculation, semen passes through the ducts and exits the body via the penis[WP,unvetted]. The atlas records it as a organ at the organ scale in the dog.

Where the ejaculatory duct is

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

What the ejaculatory duct connects to

The atlas records 5 typed relationships for it, across 2 kinds of connection. part of anatomical entity, male reproductive system and organ, and 1 more.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the ejaculatory duct. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as ductus ejaculatorii and ductus ejaculatorius. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0000999, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: anatomical entity, male reproductive system, organ and reproductive system.
• A kind of: anatomical structure.

Questions

Where is the ejaculatory duct?

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

What does the ejaculatory duct connect to?

Part of: anatomical entity, male reproductive system, organ and reproductive system.

Is the ejaculatory duct 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.