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 planning - Urban planners. 1  An urban planner is a professional who works in the field of urban planning for the purpose of optimizing the effectiveness of a community's land use and infrastructure. They formulate plans for the development and management of urban and suburban areas, typically analyzing land use compatibility as well as economic, environmental and social trends.