melanosome distribution pattern in dark and light skin

melanocyte skin pigmentation melanin keratinocyte melanosome cell membrane cluster anatomy epidermis tone pigment hair complexion basal layer dendrite dermis structure tissue diagram synthesis growth graphic infographic dark light phototype hyperpigmentation vitiligo health medicine body freckles human illustration eumelanin pheomelanin dermatology skincare melasma africanamerican asian caucasian vector process ultraviolet tan