anatomical training poster. growth and structure of human hair. skin and hair anatomy. cross section of the skin layers

anatomical anatomy and artery beauty biology blood body bulb care cell closeup cortex cosmetology cross cut cuticle cycle dermal dermatology dermis detailed epidermis follicle gland growth hair health human hypodermis illustration layer layers macro medical medicine medulla model nerv papilla poster root scalp scheme sebaceous section shaft skin structure subcutaneous tissue training trichology vector vessel