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
- EFO:0003087
- VHOG:0000602
- EMAPA:32746
- ZFA:0001374
- FMA:83509
- SCTID:191910002
- MA:0000081
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]