Set of twelve microscope slides depicting human hair and skin structures:. Human scalp, V.S., shows L.S. of hair follicles. Human scalp, H.S., shows T.S. of hair follicles. Natural blond and black hair. Grayed hair. Eyelash. Hair of beard. Hair from infant. Artificially bleached hair. Split hair tips. Singed hair. Eggs of louse attached to the hair, W.M. Human head louse (Pediculus capitis), W.M. Glossary:. L.S. - Longitudinal Section. T.S. - Transvers Section. V.S. - Vertical Section. H.S. - Horizontal Section. W.M. - Whole Mount. The product image shows Human Scalp V.S.