Assertion: muscle fiber's structure | /r/Synonym | myofibril
Facets:
Source sentences:
text: Within a muscle fiber, proteins are organized into structures called myofibrils that run the length of the cell and contain sarcomeres connected in series.
text: These stripes are caused by the regular arrangement of actin and myosin proteins within the cells into structures known as myofibrils.
text: They contain many nuclei and are subdivided into smaller structures called myofibrils.
text: Each of these cells is made up of smaller structures known as myofibrils that are in turn composed of microfilaments, actin and myosin.