OBO_REL:part_of (UNDECLARED) myocardium trabecular layer TAO:0005059 The layer of the myocardium composed of projections of contractile myocytes. The trabecular layer is bounded internally by the the endocardium. Unlike the trabeculations of higher vertebrates, both atrial and ventricular trabeculae of the zebrafish have more strut-like character, and are more uniform without apparent regional differences Hu et al. 2001. teleost_anatomy trabeculae