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单词
sinoatrial node
释义
WordReference Random House Unabridged Dictionary of American English © 2024
si
′
no•a
′
tri•al node
′
(sī
′
nō ā
′
trē əl, sī′-),
USA pronunciation
[
Anat.
]
Anatomy
a small mass of tissue in the right atrium functioning as pacemaker of the heart by giving rise to the electric impulses that initiate heart contractions. Also called
sinus node.
sino
- +
atrial
1920–25
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更新时间:2025/7/23 13:53:15