1-2-1.Cross section of skin：Stratum basale
	●It touches stratum dermis and the shape of waves, and sturatum basale receives nourishment from mamillary body in the part that became the mountain of stratum dermis and does the cell division. Divided basale cell changes spinosum cell, glanulosum cell, and shape while moving on, and becomes corneum cell at the end. ●There is "Melanocyte" that expands the tree in stratum corneum. The melanocyte makes invade a surrounding cell making the melanin granule when ultraviolet rays is hit the branch ahead, and disperses the melanin granule in the cell. The melanin granules that scatter in the cell gather like defending the nucleus from ultraviolet rays. ●There is a special cell of "Merkel cell" on the skin without the hair. This cell is between stratum basale, and is a cell that feels the sense of touch. When pressure is received, merkel cell discharges the chemical, stimulates the nerve, and transmits information that the object that touches the skin variously means.