Assertion: muscle fiber | /r/HasProperty | four fundamental constituents
Facets:
Source sentences:
text: The muscle fiber is composed of four fundamental constituents: (1) the sarcolemma that is the equivalent of the cell membrane; (2) the fibrils that represent the structural elements responsible for contraction; (3) the sarcosomes that are really the mitochondria and contribute the supply of energy for muscular contraction; (4) the sarcoplasm, which is the ground cytoplasmic substance in which the other structures of the muscle fiber are embedded; and (5) the sarcoplasmic reticulum.