Mast cells. Most histamine in the body is generated in granules in mast cells and in white blood cells called basophils and eosinophils. Mast cells are especially numerous at sites of potential injury â the nose, mouth, and feet, internal body surfaces, and blood vessels.
urban adjective. âº of or in a âcity or âtown: Many âAmericans were âleaving the âfarm for the âpromise of urban âlife. Over 82% of Texans âlive in urban âareas. (Definition of urban from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
Urban means to do with a town or city. Rural means to do with the countryside. Rural Urban Suburban are also general designations given by the US government agencies (ofte â¦ n used for determining grants and tax incentives).Not all agencies use the exact same population break downs or terms (exam. some may use Metropolitan Areas).n an urban area, it is like a cluster of homes and people, whereas the rural area is more of the out in the country sort. For example, you may have a small yard in the urban â¦ setting, but own a large yard or even many acres in the rural areas. 19 people found this useful.