sinoatrial node in dogs
The part of the cardiac conduction system that controls the timing of heart muscle contraction. It relays electrical signals to the AV node[GO]. Subdivision of conducting system of heart at the junction of the right atrium and the superior vena cava, around the sinoatrial nodal branch of right coronary artery and is continuous with the internodal tract[FMA]. Every claim on this page comes from the Leumas anatomy graph and carries its source.
What the sinoatrial node is
The part of the cardiac conduction system that controls the timing of heart muscle contraction. It relays electrical signals to the AV node[GO]. Subdivision of conducting system of heart at the junction of the right atrium and the superior vena cava, around the sinoatrial nodal branch of right coronary artery and is continuous with the internodal tract[FMA]. The atlas records it as a tissue at the tissue scale in the dog.
Where the sinoatrial node 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 sinoatrial node connects to
The atlas records 7 typed relationships for it, across 3 kinds of connection. part of cardiac atrium, conducting system of heart and myocardium of atrium, and 1 more.
Supply and innervation
This dataset asserts no arterial supply, venous drainage or innervation for the sinoatrial node. 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 Koch's node, SA nodal muscle tissue, SA node, cardiac pacemaker, node of Keith-Flack and nodus sinuatrialis, and 6 more. Searching any of those names reaches this page.
Source
Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002351, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.
- Part of: cardiac atrium, conducting system of heart, myocardium of atrium and right cardiac atrium.
- A kind of: cardiac muscle tissue and cardiac muscle tissue of myocardium.
- contributes to morphology of: conducting system of heart.
Questions
Where is the sinoatrial node?
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 sinoatrial node connect to?
Part of: cardiac atrium, conducting system of heart, myocardium of atrium and right cardiac atrium.
Is the sinoatrial node 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.