As degranulation occurs, it causes the mast cell or basophil to release a series of chemicals that orchestrate the allergic reaction. Within every mast cell or basophil are 500 to 1500 granules containing more than thirty different allergy-causing chemicals.
Urban design is an inter-disciplinary subject that unites all the built environment professions, including urban planning, landscape architecture, architecture, civil and municipal engineering.
Experience design: a definition. Experience Design is a design practice focused on human outcomes, particularly the level of engagement and satisfaction that the user derives from a product or service and the relevance of the experience to their needs and context. It is: Iterative: identifying and resolving design challenges through cycles of creativity and user research.