Muscle fascicle

Muscle fascicle
Structure of a skeletal muscle. (Fascicle labeled at bottom right.)
Details
Latin	fasiculus muscularis
Identifiers
Code	TH H3.03.00.0.00003
TA
TH	{{#property:P1694}}
TE	{{#property:P1693}}
FMA	{{#property:P1402}}
Anatomical terminology [[[d:|edit on Wikidata]]]

In anatomy, a muscle fascicle is a bundle of skeletal muscle fibers surrounded by perimysium, a type of connective tissue. (There is also a nerve fascicle of axons.)

Specialized muscle fibers in the heart that transmit electrical impulses from the atrioventricular node (AV Node) to the Purkinje fibers are fascicles, also referred to as bundle branches. These start as a single fascicle of fibers at the AV node called the bundle of His that then splits into three bundle branches: the right fascicular branch, left anterior fascicular branch, and left posterior fascicular branch.

See also

• Epimysium
• Endomysium
• Connective tissue in skeletal muscle

External links

• Histology image: 77_04 at the University of Oklahoma Health Sciences Center - "Slide 77 skeletal muscle"
• Anatomy Atlases - Microscopic Anatomy, plate 05.83 - "Smooth Muscle"
• Diagram at kctcs.edu