In the early days of Western science some investigators, who were called systematists, classified organisms into taxonomic groupings. Anatomists studied the structure of living tissue and physiologists were concerned with the function of the structures. The areas of anatomy and physiology were never completely isolated from each other. Chemists and physicists, who studied nonliving matter, became less separated from biologists and medical scientists as time went on. Prior to the invention of the microscope, anatomists could study only those structures that could be seen with the naked eye or perhaps with the aid of a simple lens. With the invention of the light microscope, they delved into things beyond ordinary vision. Not only parts of organisms but entire organisms too small to be seen by eye alone could now be investigated. In very recent times, with the invention of the electron microscope and X-ray techniques, scientists have penetrated to the very molecules and atoms of which living matter is made.
KeywordsSickle Cell Anemia Pernicious Anemia Horseshoe Crab Diuretic Agent Amino Acid Molecule
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Selected Additional Reading
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