The operculum that a bony fish is the difficult bony flap covering and protecting the gills. In most fish, the behind edge of the operculum roughly marks the division between the head and the body. The operculum is written of four bones; the opercle, preopercle, interopercle, and also subopercle. The morphology that this anatomical feature varies greatly in between species. For example, the bluegill (Lepomis macrochirus) has a posteriorly and also dorsally oriented rounded expansion with a tiny black splotch present. In part species, the operculum deserve to push water from the buccal cavity through the gills.
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For part fish, the operculum is an essential in obtaining oxygen. It opens as the mouth closes, causing the press inside the fish to drop. Water then flows towards the reduced pressure throughout the fish"s gill lamellae, permitting some oxygen to be took in from the water.
Cartilaginous fishes carry out not have actually an operculum. There is no an operculum, other methods of getting water come the gills are required, such together ventilation.
ReferencesFish, operculum (Gross, Low) BiologyBase, Fish Anatomy
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