Olive skin Olive skin Olive skin is a human skin color spectrum. It is often associated with pigmentation in the Type III to Type IV and Type V ranges of the Fitzpatrick scale. It generally refers to light or moderate brown, brownish, or tannish skin, and it is often described as having yellowish, greenish, or golden undertones. People with olive skin can sometimes become more pale if their sun exposure is limited. Lighter olive skin tans more easily than does fair skin, and generally still retains notable yellow or greenish undertones. Type III pigmentation is frequent among populations from parts of the
Mucosa-associated lymphoid tissue Mucosa-associated lymphoid tissue The mucosa-associated lymphoid tissue (MALT), also called mucosa-associated lymphatic tissue, is a diffuse system of small concentrations of lymphoid tissue found in various submucosal membrane sites of the body, such as the gastrointestinal tract, oral passage, nasopharyngeal tract, thyroid, breast, lung, salivary glands, eye, and skin. MALT is populated by lymphocytes such as T cells and B cells, as well as plasma cells and macrophages, each of which is well situated to encounter antigens passing through the mucosal epithelium. In the case of intestinal MALT, M cells are also present, which sample antigen from the lumen and