| 词汇 | sinoatrial-node |
| 释义 | sinoatrial node noun[ Cusually singular ] anatomy specialized(alsosino-atrial node)uk /saɪ.nəʊˌeɪ.tri.əl ˈnəʊd/ us /saɪ.noʊˌeɪ.tri.əl ˈnoʊd/(alsosinuatrial node) a group of muscle fibres in the right atrium of the heart that sends out electrical signals to control the normal beating of the heart: This electrical signal begins in the sinoatrial node, located at the top of the right atrium. This is the interval between two consecutive normal stimuli originating from the sino-atrial node. The sinuatrial node determines the rate of the heart beat. The damage to the sinoatrial node leads to an irregular heart rhythm known as atrial fibrillation. The vagus nerve innervates the sinoatrial node of the heart. The circulatory system & blood ABO accessory pathway adventitia adventitial ANA auricle bicuspid valve femoral artery gamma globulin glomus granulocyte haematogenous haemic phagocyte portal system precava pulmonary artery pulmonary vein pulmonic tricuspid valve Synonymsinus node |
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