Sinoatrial-node
[sahy-noh-ey-tree-uh l, sahy-] /ˈsaɪ noʊˈeɪ tri əl, ˌsaɪ-/
noun, Anatomy.
1.
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.
sinoatrial node n.
Abbr. SAN
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. Also called sinoauricular node, sinus node.
sinoatrial 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.
Read Also:
- Sinoauricular block
sinoauricular block n. See sinoatrial block.
- Sinoauricular node
sinoauricular node n. See sinoatrial node.
- Sin-offering
(Heb. hattath), the law of, is given in detail in Lev. 4-6:13; 9:7-11, 22-24; 12:6-8; 15:2, 14, 25-30; 14:19, 31; Num. 6:10-14. On the day of Atonement it was made with special solemnity (Lev. 16:5, 11, 15). The blood was then carried into the holy of holies and sprinkled on the mercy-seat. Sin-offerings were also […]
- Sino-Japanese War
[sahy-noh-jap-uh-neez, -nees, -jap-uh-neez, -nees] /ˈsaɪ noʊˈdʒæp əˌniz, -ˌnis, -ˌdʒæp əˈniz, -ˈnis/ noun 1. the war (1894–95) between China and Japan over the control of Korea that resulted in the nominal independence of Korea and the Chinese cession to Japan of Formosa and the Pescadores. 2. the war that began in 1937 as a Japanese invasion […]
- Sinologist
noun 1. a person who specializes in Sinology.