Robust muscular tunic of the heart which forms the basic part of its walls. Its external surface is covered by the pericardium and its internal one by the endocardium.
hog:0001245
hog:0000602 atrium myocardiumhog:0000604 ventricle myocardiumhog:0001230 left auricle myocardiumBFO:0000050 part of
hog:0000276
tao:0001319