Name:	muscle cell
Synonyms:	myocyte, myofiber
Definition:	A mature contractile cell, commonly known as a myocyte, that forms one of three kinds of muscle.
Ontology:	Anatomy Ontology [ZFA:0009114]

Name:	myofibril
Synonyms:
Definition:	The contractile element of skeletal and cardiac muscle; a long, highly organized bundle of actin, myosin, and other proteins that contracts by a sliding filament mechanism.
Ontology:	GO: Cellular Component [GO:0030016] QuickGO AmiGO