the atrial part of middle layer of the heart, comprised of involuntary muscle [ https://www.worldcat.org/search?q=bn%3A0-683-40008-8 MP:0010493 ]
Synonyms: atrial myocardium atrium myocardium
Term information
- TAO:0001374
- VHOG:0000602
- ZFA:0001374
- MA:0000081
- null:http://www.snomedbrowser.com/Codes/Details/191910002
- EFO:0003087
- EMAPA:32746
- FMA:83509
efo_slim, pheno_slim, vertebrate_core
As noted, the hearts of birds and mammals have four chambers that arises from the two chambers (atrium and ventricle) of the fish heart.[uncertain][VHOG]