| Name: | myocardium | 
|---|---|
| Synonyms: | cardiac muscle, heart muscle | 
| Definition: | |
| Ontology: | Anatomy Ontology [ZFA:0001319] | 
| Name: | M band | 
|---|---|
| Synonyms: | M disc, M line, mesophragma, midline | 
| Definition: | The midline of aligned thick filaments in a sarcomere; location of specific proteins that link thick filaments. Depending on muscle type the M band consists of different numbers of M lines. | 
| Ontology: | GO: Cellular Component [GO:0031430] QuickGO AmiGO |