hair structure layer. sebaceous cuticles and nerve endings with cellular fibers. anatomical of hair on white background

anatomy cuticle medicine stem shampoo moisturizing hygiene collagen beauty repair microscopic brown biology fiber strand strands black treatment sebaceous skin scientific keratin innovation growth healthy structure human vector root hair dermis cell care science bulb medical shaft dermatology blood health layer nerve diagram papilla scalp isolated icon layer cuticles endings cellular fibers anatomical white background background realistic concept