Here's a photomicrograph of the principal fibers that limit movement and stabilize the body's shape. The blue diagonal line is a single tropocollagen (pre-collagen unit). They combine into the triple helix (three stranded rope) of a collagen molecule (lower middle). The yellow snaky one is elastin - like a rubber band. The thin cobweb-like fibers are reticulin - immature collagen found mostly in embryos.