Assertion: muscle fiber's myofibril | /r/HasProperty | thick and thin filaments
Facets:
Source sentences:
text: Myofibrils are composed of thick and thin filaments.
text: Myofibrils are composed of thick and thin filaments.
text: Myofibrils are composed of thick and thin filaments.
text: Myofibrils are composed of thick and thin filaments.