External secretion
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Secretions that occur through ducts on the surface of the body, in the digestive tract, or in body cavities. In addition to sweat, milk, sebum, and digestive juices, the mucus on the surface of fish's bodies, the shells of shellfish, the wax of honeybees, the silk spun by spiders and silkworms, and the venom of poisonous snakes and bees are all exocrine secretions. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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体表，消化管，体腔などに導管を通じて行なう分泌。汗，乳汁，皮脂，消化液のほかに，魚類の体表粘液，貝類の殻，ミツバチのろう，クモやカイコの紡出する糸，毒ヘビやハチの毒液なども外分泌作用によるもの。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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