Cuticle (hair)
Videos
The hair cuticle is the outermost part of the hair shaft. It is formed from dead cells, overlapping in layers, which form scales that strengthen and protect the hair shaft.
Comparison of sheep (top) and human (bottom) hairs with different cuticle textures
Melanin
Videos
Melanin is a family of biomolecules organized as oligomers or polymers, which among other functions provide the pigments of many organisms. Melanin pigments are produced in a specialized group of cell
Micrograph of melanin pigment (light refracting granular material—center of image) in a pigmented melanoma
Micrograph of the epidermis, with melanin labeled at left
Display of the presentation of the red pheomelanin pigment alongside the black eumelanin pigment in the hairs and skin of the paw pad of a tortoiseshell cat.
The biochemical composition of peptidomelanin