A new method to visualize Langer's lines.
After reviewing Langer's papers on lines of cleavage in the skin, experiments were done that showed a correspondence between those lines and the directions that hairs stream.
D062109:Dermatologic Surgical Procedures; D006801:Humans; D008297:Male; D012867:Skin / Q000033:anatomy & histology; D013518:Surgery, Plastic; D014951:Wounds, Stab / Q000601:surgery