Information about Operculum (fish)
The operculum of a bony fish is the hard bony flap covering and protecting the gills. In most fish, the rear edge of the operculum roughly marks the division between the head and the body. The operculum is composed of four bones; the opercle, preopercle, interopercle, and subopercle. The morphology of this anatomical feature varies greatly between species. For example, the bluegill (Lepomis macrochirus) has a posteriorly and dorsally oriented rounded extension with a small black splotch present. In some species, the operculum can push water from the buccal cavity through the gills.
For some fish, the operculum is vital in obtaining oxygen. It opens as the mouth closes, causing the pressure inside the fish to drop. Water then flows towards the lower pressure across the fish's gill lamellae, allowing some oxygen to be absorbed from the water.
Cartilaginous fishes do not have an operculum. Without an operculum, other methods of getting water to the gills are required, such as ventilation.
For some fish, the operculum is vital in obtaining oxygen. It opens as the mouth closes, causing the pressure inside the fish to drop. Water then flows towards the lower pressure across the fish's gill lamellae, allowing some oxygen to be absorbed from the water.
Cartilaginous fishes do not have an operculum. Without an operculum, other methods of getting water to the gills are required, such as ventilation.
References
Osteichthyes
Huxley, 1880
Classes
Actinopterygii
Sarcopterygii
Osteichthyes (IPA: /ˌɒstiːˈɪkθiːz/) are a taxonomic superclass of fish, also called
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Huxley, 1880
Classes
Actinopterygii
Sarcopterygii
Osteichthyes (IPA: /ˌɒstiːˈɪkθiːz/) are a taxonomic superclass of fish, also called
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A gill is a respiration organ that functions for the extraction of oxygen from water and the excretion of carbon dioxide. Unlike many small aquatic animals, which can absorb oxygen through the entire surface of their bodies, more complex aquatic organisms have gills specially
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L. macrochirus
Binomial name
Lepomis macrochirus
Rafinesque, 1819
The Bluegill (Lepomis macrochirus) is a species of freshwater fish sometimes referred to as bream, brim, or coppernose.
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Binomial name
Lepomis macrochirus
Rafinesque, 1819
The Bluegill (Lepomis macrochirus) is a species of freshwater fish sometimes referred to as bream, brim, or coppernose.
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mouth, also known as the buccal cavity or the oral cavity, is the orifice through which an organism takes in food and water.
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Location
In all mammals, the mouth is forward-facing in the face. Non-mammals have mouths in other locations (e.g...... Click the link for more information.
A lamella is a thin plate-like structure, often one amongst many lamellae very close to one another, with open space between. Aside from respiratory organs, they appear in other biological roles including filter feeding, the traction surfaces of geckos, and chloroplast
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Chondrichthyes
Huxley, 1880
Subclasses and Orders
See text.
The Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone.
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Huxley, 1880
Subclasses and Orders
See text.
The Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone.
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ventilation (or ventilation rate) is the rate at which gas enters or leaves the lung. It is categorised under the following definitions:
Measurement Equation Description
Minute ventilation = tidal volume * respiratory rate[1]
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Measurement Equation Description
Minute ventilation = tidal volume * respiratory rate[1]
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