Myofibril (Noun)
Meaning
One of many contractile filaments that make up a striated muscle fiber.
Classification
Nouns denoting body parts.
Examples
- The myofibril is composed of repeating units called sarcomeres, which are the functional units of muscle contraction.
- Each myofibril is surrounded by a network of tubules and vesicles that regulate the flow of ions and nutrients.
- The myofibril is made up of thick and thin filaments that slide past each other to produce muscle contraction.
- The arrangement of myofibrils within a muscle fiber gives it a striated appearance under the microscope.
- Damage to the myofibril can lead to muscle weakness and fatigue, as seen in certain muscular dystrophies.