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myofibril

American  
[mahy-uh-fahy-bruhl, -fib-ruhl] / ˌmaɪ əˈfaɪ brəl, -ˈfɪb rəl /

noun

Cell Biology.
  1. a contractile fibril of skeletal muscle, composed mainly of actin and myosin.


Etymology

Origin of myofibril

First recorded in 1895–1900; myo- + fibril

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Example Sentences

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See Examples For:

Many sarcomeres are present in a myofibril, resulting in the striation pattern characteristic of skeletal muscle.

From Textbooks Jun. 9, 2022

Thick filaments occur only in the A band of a myofibril.

From Textbooks Jun. 9, 2022

The triad surrounds the cylindrical structure called a myofibril, which contains actin and myosin.

From Textbooks Jun. 19, 2013

The sarcomere itself is bundled within the myofibril that runs the entire length of the muscle fiber and attaches to the sarcolemma at its end.

From Textbooks Jun. 19, 2013

The coordinated contractions of many sarcomeres in a myofibril leads to contraction of the entire muscle cell and ultimately the muscle itself.

From Textbooks Apr. 25, 2013

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