Sinoatrial Node Definition

sīnōātrēəl
noun
A small mass of specialized cardiac muscle fibers located in the posterior wall of the right atrium of the heart that acts as a pacemaker by generating at regular intervals the electric impulses of the heartbeat.
American Heritage Medicine
Webster's New World
Synonyms:
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Other Word Forms of Sinoatrial Node

Noun

Singular:
sinoatrial node
Plural:
sinoatrial nodes

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sinoatrial node
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