Fig. 41. Insertion of the anterior ciliary muscle (CM). Muscle fiber tips are densely fibrillar and surrounded by basement membrane, except between areas where elastic tendons attach (asterisks). The tendons are composed of long bundles of elastic microfibrils (arrows) and banded elastic fibers attaching near dense areas on the muscle cell wall. Cords of amorphous elastin (arrowheads) in the banded fibers are identified by gold-labeled elastin antibody. (X 37,200)