myofibril Definition
- 1a basic rod-like unit of a muscle cell that contains the contractile filaments
- 2a cylindrical organelle running along the length of a muscle fiber, containing actin and myosin filaments that slide past each other to cause contraction
Using myofibril: Examples
Take a moment to familiarize yourself with how "myofibril" can be used in various situations through the following examples!
Example
Myofibrils are responsible for muscle contraction.
Example
The myofibrils in skeletal muscles are arranged in a repeating pattern of units called sarcomeres.
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Summary: myofibril in Brief
A 'myofibril' [mahy-uh-fahy-bril] is a rod-like unit found in muscle cells that is responsible for muscle contraction. It contains actin and myosin filaments that slide past each other to cause contraction. The arrangement of myofibrils in skeletal muscles is in a repeating pattern of units called sarcomeres.
