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[3] [47] The Food and Agriculture Organization estimated in 2002 that over 50,000 medicinal plants are used across the world. [48] The Royal Botanic Gardens, Kew more conservatively estimated in 2016 that 17,810 plant species have a medicinal use, out of some 30,000 plants for which a use of any kind is documented. [49]
Archaeological evidence indicates that the use of medicinal plants dates back to the Paleolithic age, approximately 60,000 years ago. Written evidence of herbal remedies dates back over 5,000 years to the Sumerians, who compiled lists of plants. Some ancient cultures wrote about plants and their medical uses in books called herbals.
Human uses of plants include both practical uses, such as for food, clothing, and medicine, and symbolic uses, such as in art, mythology and literature. Materials derived from plants are collectively called plant products .
In the Latin names for plants created by Linnaeus, the word officinalis indicates that a plant was used in this way. For example, the marsh mallow has the classification Althaea officinalis, as it was traditionally used as an emollient to soothe ulcers. [2] Pharmacognosy is the study of plant sources of phytochemicals.
Some components of these toxins such as enzymes and inorganic salts are used in modern medicine. [21] For example, drugs such as Captopril and Lisinopril are derived from snake venom and inhibit the angiotensin-converting enzyme. [22] [21] Another example is Ziconotide, a drug from the cone snail, Conus magus, that is used to reduce pain. [21] [23]
Generally, bush medicine used by Aboriginal and Torres Strait Islander people in Australia is made from plant materials, such as bark, leaves and seeds, although animal products may be used as well. [33] A major component of traditional medicine is herbal medicine, which is the use of natural plant substances to treat or prevent illness. [34]
The first individual to study the emic perspective of the plant world was a German physician working in Sarajevo at the end of the 19th century: Leopold Glück. His published work on traditional medical uses of plants done by rural people in Bosnia (1896) has to be considered the first modern ethnobotanical work. [18]
Fragrance: used to add a pleasant odor to food, medicine, or other consumed or partially consumed items (such as incense, candles, or lotions) Dye: used to alter the color of food, medicine, or other consumed items Ritual: ingested or partially ingested (eg used as incense) as an important component of a cultural or religious ritual