Any of the elongated contractile threads found in striated muscle cells.
- In cross section, skeletal muscle fibers are seen to be composed of numerous small aggregates of contractile substance, the myofibrils.
- Briefly, the cardiac myofibrils are composed of the major contractile proteins, actin and myosin.
- Individual muscle cells are extremely elongated and enclose many-stranded cables woven from threads called myofibrils.
For editors and proofreaders
Line breaks: myo|fib¦ril
Definition of myofibril in:
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.