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

This is just here as a test because I lose it

Term information

database cross reference
Subsets

efo_slim, pheno_slim, vertebrate_core

UBPROP 0000003

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]

has related synonym

atrium cardiac muscle

id

UBERON:0002302