English Explanatory Dictionary

sinoatrial node

English dictionary entry

Meanings

noun
  1. A group of cells located in the wall of the right atrium of the heart that originates the impulses stimulating the heartbeat.

Word forms

sinoatrial node sinoatrial nodes SA node

Synonyms

sinus node pacemaker

Related words

atrioventricular node

Derived words

sinoatrial nodal
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