Definition of myofibril in English:
myofibril
noun ˌmʌɪə(ʊ)ˈfʌɪbrɪl-ˈfib-
Any of the elongated contractile threads found in striated muscle cells.
Example sentencesExamples
- Individual muscle cells are extremely elongated and enclose many-stranded cables woven from threads called myofibrils.
- In cross section, skeletal muscle fibers are seen to be composed of numerous small aggregates of contractile substance, the myofibrils.
- Inside the fibre are the myofibrils, which constitute the contractile apparatus, and a system for controlling the myofibrils through changes in calcium concentration.
- Briefly, the cardiac myofibrils are composed of the major contractile proteins, actin and myosin.
- The number of myofibrils within the enlarged muscle fiber can increase more than 10-fold.