When an allergic individual is exposed to a sensitizing allergen, the body makes a specific IgE, one that is able to recognize only that allergen. (see above chart). Millions of mast cells and basophils are all over the body.
Urban morphology is the study of the form of human settlements and the process of their formation and transformation. The study seeks to understand the spatial structure and character of a metropolitan area, city, town or village by examining the patterns of its component parts and the process of its development.
Urban morphology has formed a part of Anglophone human geography since the early 1900s. The aim here is to summarize its development since then, and to identify particular âschoolsâ or traditions of urban morphology that emerged over this time.