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Histology is the study of the microscopic structure of biological material and the ways in which individual components are structurally and functionally related. It is central to medical science since it stands at the crossroads between biochemistry, molecular biology and physiology on the one side, and pathologic processes that cause disease on the other. Although often thought of as an archaic discipline, practical knowledge of histology is in actuality an integral part of modern investigative techniques and current medical practice