Perimysium
Template:Short description Template:Refimprove Template:Infobox anatomy
Perimysium is a sheath of dense irregular connective tissue that groups muscle fibers into bundles (anywhere between 10 and 100 or more) or fascicles.
Studies of muscle physiology suggest that the perimysium plays a role in transmitting lateral contractile movements. This hypothesis is strongly supported in one exhibition of the existence of "perimysial junctional plates" in ungulate flexor carpi radialis muscles.<ref>Template:Cite journal</ref> The overall comprehensive organization of the perimysium collagen network, as well as its continuity and disparateness, however, have still not been observed and described thoroughly everywhere within the muscle.Template:Citation needed It contains mainly type I collagen, then type III and V in descending order.<ref>Template:Cite journal</ref>