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Definition of Term

(English) Respiratory organ of many aquatic animals; a filamentous outgrowth well supplied with blood vessels at which gas exchange between water and blood occurs. (See also: gill arch, respiration)
(French) Organe respiratoire de beaucoup d'animaux aquatiques ; excroissance filamenteuse bien irriguée par des vaisseaux sanguins au niveau de laquelle l’échange du gaz entre l'eau et le sang se produit. (See also: gill arch, respiration)
(Portuguese) Orgão respiratório de vários animais aquáticos. (See also: gill arch, respiration)

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