sinus venosus in dogs

The sinus venosus is a large cardiac chamber at the inflow tract that receives venous blood from systemic circulation. precedes the atrium on the venous side of the chordate heart. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the sinus venosus is

The sinus venosus is a large cardiac chamber at the inflow tract that receives venous blood from systemic circulation. precedes the atrium on the venous side of the chordate heart. The atlas records it as a organ at the organ scale in the dog.

Where the sinus venosus is

It sits in the thorax and trunk, within the muscular and cardiovascular systems. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the sinus venosus connects to

The atlas records 6 typed relationships for it, across 4 kinds of connection. part of conducting system of heart, heart and organ.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the sinus venosus. 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 inflow tract, sinus venarum, sinus venosus cordis, venarum, venarum sinus and venosus. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002063, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

Questions

Where is the sinus venosus?

It sits in the thorax and trunk, within the muscular and cardiovascular systems. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the sinus venosus connect to?

Part of: conducting system of heart, heart and organ.

Is the sinus venosus 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.