has part has part in taxon Homo sapiens strand of vibrissa hair venous sinus pilosebaceous unit vibrissa unit A pilosebaceous unit that contains a strand of vibrissa hair (a specialized tactile hair) with the follicle incorporating a blood sinus, heavily innervated by sensory nerves. EMAPA:17529 MA has distinct classes for vibrissa and vibrissa hair - the former includes the follicle and is thus not the hair proper. We model this as the 'vibrissa unit' UBERON:0011933 MA:0000163 vibrissa