The skin plays a role in the production of vitamin D because when dehydrocholesterol reaches the skin by means of the blood and is exposed to ultraviolet light from the sun, it changes to vitamin D in an inactive form.
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Most likely showing your work would contain self checks, so study guides?
Answer:
Darker patches in the skin. Not mater the size, the small patch could be hiding cancer with the possibility of tumors under the patch of skin.
