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atrioventricular node
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atrioventricular node
noun Anatomy.
a small mass of muscular fibers at the base of the wall between the atria, conducting impulses received from the sinoatrial node by way of the atrioventricular bundles and, under certain conditions, functioning for the sinoatrial node as pacemaker of the heart. Abbreviation: A-V node.
Origin:
1930–35
1930–35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Atrioventricular node
is always a great word to know.
So is sciatic nerve. Does it mean:
| the movable organ in the floor of the mouth functioning in eating, tasting, and in speaking |
| a pair of the largest nerves in the body that originate in the lower back and extend down to above the knees, where they divide into other nerves |
American Heritage
Medical Dictionary
atrioventricular node n.
A small mass of specialized cardiac muscle fibers, located near the ostium of the coronary sinus and giving rise to the atrioventricular bundle of the conduction system of the heart. Also called A-V node.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
atrioventricular node  (ā'trē-ō-věn-trĭk'yə-lər) Pronunciation Key
A small area of specialized cardiac muscle cells that conducts impulses from the sinoatrial node to the ventricles and initiates the contraction of the ventricles. It is located in the right atrium. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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