Submitted by Anonymous (not verified) on Mon, 08/14/2017 - 12:04
Muscles shorten or contract to move the skeleton. The origin of the muscle is where it begins and the insertion is where it attaches. The insertion moves toward the origin during contraction. A muscle has a connective tissue covering called the epimysium. A little deeper are bundles of muscle fiber called fasciculi which are covered by perimysium. Each individual muscle fiber has a covering called the endomysium.
