isthmus

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.

Type Organ
Parent Structure external soft tissue zone

Frequently Asked Questions

What is the isthmus?
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.

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.