In fish, an operculum is a structure made of bone that covers and protects the gills. This short article about biology can be made longer. You can help...

Operculum, proper medical term Pericoronitis is inflammation of the gums that causes a flap of gum to form over a wisdom tooth, mostly when the tooth...

adaptations which relate to their respiration: First, they had some kind of operculum (a set of bones which cover the gills). The also developed a primitive...

marine species. They breathe air, are hermaphrodite, and usually have no operculum. Bouchet P. & Rocroi J.-P. (eds) 2005. Classification and nomenclator...

swimming legs of this creature are Hughmilleria-type and the genital operculum could mean Bassipterus is closely related to another genus called Pittsfordipterus...

species is M. ignotus. It was small in size and resembled a coelacanth. Operculum is large and rounded. The ventral side had longitudinal rows of large...

supported either separated, shark-like gill slits or a single chimaera-like operculum (gill cover). "New eugeneodontid sharks from the Lower Triassic Sulphur...

nostrils cannot be seen because they are under feathers or a cover called an operculum. Ducks, geese, and swans have a special plate at the end of the beak called...

neuropathy from an unruptured arteriovenous malformation in the frontal operculum: A case report". Surgical Neurology International. Retrieved 2019-07-31...

zebra, the opening is gray and ocher like parietal callus area and the operculum is bright yellow Puperita pupa is a gastropod mollusk widely distributed...

old ivory a Golden sheen. The early whorls faintly wine colored. The operculum is circular and yellow to brown colors Caribbean and Gulf of Mexico. Muddy...

notch. They also have a foot ending in a pointed, sickle-shaped, horny operculum. They grow a flared lip on their shells upon reaching sexual maturity...

Louisiana. The genus name Pomoxis comes from the Greek πώμα (cover, plug, operculum) and οξύς (sharp). The common name (also spelled croppie or crappé), comes...

hand side (viewed with the shell apex pointing up). Some species have an operculum, a lid or trapdoor to close the shell. In some, the slugs, the shell is...

out of the slits beneath the gills. These gills are located under the operculum. The circulatory system of fish is responsible for transporting blood...

The anatomy of Lampanyctodes hectoris 1. operculum (gill cover) 2 & 5. lateral line 3. dorsal fin 4 fat fin 6. caudal fin 7. anal fin 8. photophores 9...

The anatomy of Lampanyctodes hectoris 1. operculum (gill cover) 2 & 5. lateral line 3. dorsal fin 4 fat fin 6. caudal fin 7. anal fin 8. photophores 9...

Skull of european perch showing the eye sockets, connective bones, operculum, and gill slits....

large and had many folds (labyrinthodont). The back of the skull had an operculum, which is a flap that covered the gills. There was a hole for breathing...

is toothless, it does have a single row of big pharyngeal teeth. The operculum's gill rakers are medium in size and widely spaced, and there's 18-19 of...

about 2 by 0.8 cm (0.79 by 0.31 in) wide. They have a long, pointed cap (operculum) that looks like a beak, making the buds spindle-shaped. The fruits are...

there. The flower starts as a small bud with a protective cap called the "operculum". This cap covers the inside of the flower while the male and female parts...

Jaw hyomandibula pharyngeal jaw Leydig's organ Mauthner cell Meristics Operculum papillare Papilla Photophore Root effect Shark cartilage Scales ganoine...

Jaw hyomandibula pharyngeal jaw Leydig's organ Mauthner cell Meristics Operculum papillare Papilla Photophore Root effect Shark cartilage Scales ganoine...