Definition of Term

isthmus

(English) In ichthyology, the fleshy throat region of a fish which extends forward from the ventral part of the chest and narrows anteriorly, and externally separating the two gill chambers; that narrowed portion of the breast which lies between the gill chambers and separates them. (See also: ichthyology, gill chamber, chest)

isthme

(French) En ichtyologie, région de la gorge d'un poisson qui s'étend vers l'avant de la partie ventrale de la poitrine et se rétrécit antérieurement, et qui, extérieurement, sépare les deux cavités branchiales. (See also: ichthyology, gill chamber, chest)

istmus

(Portuguese) Em Ictiologia, a região carnuda da garganta dos peixes que começa na zona ventral do peito e se estreita para a zona anterior, dividindo externamente as duas câmaras branquiais, (See also: ichthyology, gill chamber, chest)

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