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
Other Word Forms of Sinoatrial Node
Noun
Singular:
sinoatrial node
Plural:
sinoatrial nodes
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