The myofibril is the basic muscle cell, within which is the sarcomere, the basic unit of muscle contraction.
Fiber, Myofibril, Myofilament.
A long filamentous organelle with a banded appearance is a myofibril. A myofibril is a cylindrical structure that extends along the complete length of each muscle cell.
Myofibril
myofibril
myofilament myofibril myofiber fascicle muscle
The organization of a skeletal muscle from smallest to largest is as follows: myofilaments > myofibrils > muscle fiber > fascicle > muscle
muscle fiber, myofibril, myofilaments, sarcomere
Muscle, fasicle, muscle fiber, myofibril, myofilament
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A myofibril is a bundle of contractile filaments (myofilaments), 1-2 μm in diameter, that are arranged in parallel groups in the cytoplasm of striated muscle cells.
The myofibrils are cells in the muscle that provide energy to them and to atrophy is to shrink or become less, so myofibril atrophy is the shrinking or lessening or those cells within the muscle for any reason(such as lack of exercise or injury)