| 单词 | sinoatrial node |
| 释义 | sinoatrial node[ sahy-noh-ey-tree-uhl, sahy- ] / ˈsaɪ noʊˈeɪ tri əl, ˌsaɪ- / noun 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. Origin of sinoatrial node1920–25; sino- + atrial Words nearby sinoatrial nodeSinn Fein, sinningia, sino-, sinoatrial, sinoatrial block, sinoatrial node, sinoauricular, sinoauricular block, sinoauricular node, Sino-Japanese War, Sinologist Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Medical definitions for sinoatrial nodesinoatrial node n.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 of the cardiac conduction system by generating at regular intervals the electric impulses of the heartbeat.sinoauricular node sinus node The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for sinoatrial nodesinoatrial node [ sī′nō-ā′trē-əl ] A small mass of specialized cardiac muscle fibers that acts as a pacemaker by initiating and maintaining normal heartbeat and cardiac rhythm. It is located in the right atrium. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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