Myofibril

Myofibril
Myofibril
	Skeletal muscle, with myofibrils labeled at upper right.
Details
Identifiers
Latin	myofibrilla
MeSH	D009210
TH	H2.00.05.0.00007
	Anatomical terms of microanatomy

A myofibril (also known as a muscle fibril or sarcostyle)^[1] is a basic rod-like organelle of a muscle cell.^[2] Skeletal muscles are composed of long, tubular cells known as muscle fibers, and these cells contain many chains of myofibrils.^[3] Each myofibril has a diameter of 1–2 micrometres.^[3] They are created during embryonic development in a process known as myogenesis.

Myofibrils are composed of long proteins including actin, myosin, and titin, and other proteins that hold them together. These proteins are organized into thick, thin, and elastic myofilaments, which repeat along the length of the myofibril in sections or units of contraction called sarcomeres. Muscles contract by sliding the thick myosin, and thin actin myofilaments along each other.

^ "Definition of SARCOSTYLE". www.merriam-webster.com.
^ McCracken, Thomas (1999). New Atlas of Human Anatomy. China: Metro Books. pp. 1–120. ISBN 1-5866-3097-0.
^ ^a ^b Alberts, Bruce (2015). Molecular biology of the cell (Sixth ed.). New York, NY. pp. 918–921. ISBN 9780815344643.{{cite book}}: CS1 maint: location missing publisher (link)

[MW-1] "Definition of SARCOSTYLE". www.merriam-webster.com.

[2] McCracken, Thomas (1999). New Atlas of Human Anatomy. China: Metro Books. pp. 1–120. ISBN 1-5866-3097-0.

[Alberts2-3] Alberts, Bruce (2015). Molecular biology of the cell (Sixth ed.). New York, NY. pp. 918–921. ISBN 9780815344643.{{cite book}}: CS1 maint: location missing publisher (link)

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