muscle that forms a ring around a body opening (i.e. obicularis occuli)
the muscle fibers are based over a wide surface area, but all fibers come together at a common attachment site.
any muscle having long fibers that are parallel to each other
fibers are arranged parallel to the line from origin to insertion and end in flat tendons at both ends
muscle fibers attached to one side of tendon.
muscle fibers are in opposite sides of central tendon
diagonal muscle fibers are in multiple rows with central tendon branching into two or more tendons