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]. [ http://en.wikipedia.org/wiki/Sinoatrial_node http://amigo.geneontology.org/amigo/term/GO:0003163 ]

This is just here as a test because I lose it

Term information

database cross reference
Subsets

uberon_slim, pheno_slim, vertebrate_core, human_reference_atlas

latin term
nodus sinuatrialis [ FMA : 9477 FMA : TA ]
comment
  • WP:Heart states: "The SA node is found in all amniotes but not in more primitive vertebrates. In these animals, the muscles of the heart are relatively continuous and the sinus venosus coordinates the beat which passes in a wave through the remaining chambers. Indeed, since the sinus venosus is incorporated into the right atrium in amniotes, it is likely homologous with the SA node. In teleosts, with their vestigial sinus venosus, the main centre of coordination is, instead, in the atrium.". Note however that ZFA has SA node.
definition
  • 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].
depicted by
  • http://upload.wikimedia.org/wikipedia/commons/d/d2/Sinoatrial_node_low_mag.jpg
  • http://upload.wikimedia.org/wikipedia/commons/d/de/Sinoatrial_node_2_low_mag.jpg
has exact synonym
  • sinuatrial nodal muscle tissue
  • node of Keith-Flack
  • Koch's node
  • sinus node of Keith and Flack
  • sinu-atrial node
  • sinoatrial node
  • SA nodal muscle tissue
  • nodus sinuatrialis
  • cardiac pacemaker
  • SA node
  • sinus node
  • sinuatrial node
has related synonym
  • nodus sinuatrialis
id
  • UBERON:0002351
present in taxon
  • http://purl.obolibrary.org/obo/NCBITaxon_9606