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Most of the crude drugs are obtained from plants & only a small no comes from animals & mineral origin. Drugs obtained from plants consist of entire plants or their parts. Ephedra & datura are entire plants. While senna leaves & podes, nux-vomica seeds & cinchona bark are parts of plants. crude drugs may also be obtained by physical processes like drying (opium) or extracting with water (catechu,agar)
several other useful substances affecting health of animals & human being are also included along with crude drugs in the study of pharmacognosy. These substances include allergens, anti-biotics, flavouring agents, colours, pesticides, immunizing agents, vehicles & diagnostic aids.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoIt is a scientific and systematic study of physical, chemical and biological characters of crude drugs including there history, cultivation,collection and preparation for the commerce is known as PHARMACOGNOSY
Wiki User
∙ 12y agoPharmacognosy deals with chemistry, biochemistry, isolation, structure determination and bioavaibility and pharmacological aspects of natural sources, natural products and natural compounds. In analytical Pharmacognosy, the microscopical features, anatomical and morphological caharcateristics of herbal drugs preparaed from pedicianl plants are studied, in addition natural chemical pure compounds are isolatede and the chemical formulae are determined, and the biologically active compounds are searched for their pharmacological and biochemical properties.
Wiki User
∙ 9y agoPharmacognosy is the study of medications and drugs in their raw form. "Pharmac" is the Greek root for a drug while "ognosy" means knowledge.
Wiki User
∙ 11y agoPharmacognosy is the study of natural medicines.
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