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]. [ Wikipedia:Sinoatrial_node GO:0003163 ]
术语信息
- FMA:9477
- Wikipedia:Sinoatrial_node
- UMLS:C0037189 (ncithesaurus:Sinoatrial_Node)
- MESH:D012849
- MA:0000097
- EHDAA2:0004184
- EMAPA:35772
- SCTID:277687007
- ZFA:0005069
- GAID:561
- BTO:0004358
- OpenCyc:Mx4rOhejDGMcEd2AAABQjYGu0g
- TAO:0005069
- NCIT:C33555
uberon_slim, pheno_slim, vertebrate_core
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.
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://upload.wikimedia.org/wikipedia/commons/d/de/Sinoatrial_node_2_low_mag.jpg
http://upload.wikimedia.org/wikipedia/commons/d/d2/Sinoatrial_node_low_mag.jpg
sinus node
cardiac pacemaker
SA node
sinus node of Keith and Flack
sinuatrial nodal muscle tissue
nodus sinuatrialis
SA nodal muscle tissue
sinoatrial node
sinuatrial node
node of Keith-Flack
Koch's node
sinu-atrial node