Complex sentence: One theory is that a cowlick stems from a circular arrangement of the collagen fibers in the cranial fascia of the area of the cowlick, this arrangement is different from the normal, straight pattern.
Split into simpler sentences: One theory is that a cowlick stems from a circular arrangement of the collagen fibers in the cranial fascia of the area of the cowlick. This arrangement is different from the normal, straight pattern.