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It can also refer to the occipital operculum, part of the occipital lobe. The insular lobe is a portion of the cerebral cortex that has invaginated to lie deep within the lateral sulcus . It sits like an island (the meaning of insular ) almost surrounded by the groove of the circular sulcus and covered over and obscured by the insular opercula.
Operculum (lid) "Finger" that turns inside out / / / Barbs Venom Victim's skin Victim's tissues. An operculum is an anatomical feature, a stiff structure resembling a lid or a small door that opens and closes, and thus controls contact between the outside world and an internal part of an animal. Examples include:
Operculum (animal), a structure resembling a lid or a small door that opens and closes; Operculum (bird), a structure which covers the nares of some birds; Operculum (bryozoa), a lid on the orifice of some bryozoans; Operculum (fish), a flap covering the gills of bony fish; Operculum (gastropod), a sort of trapdoor used to close the aperture of ...
Shell of marine snail Lunella torquata with the calcareous operculum in place Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place. The operculum (Latin for 'cover, covering'; pl. opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also ...
Gastropod shell of Viviparus contectus with its corneous operculum in place. Corneous is a biological and medical term meaning horny, in other words made out of a substance similar to that of horns and hooves in some mammals. The word is generally used to describe natural or pathological anatomical structures made out of a hard layer of protein.
The rock dove's operculum is a mass at the base of the bill. The nares of some birds are covered by an operculum (plural opercula), a membraneous, horny or cartilaginous flap. [5] (p117) [47] In diving birds, the operculum keeps water out of the nasal cavity; [5] (p117) when the birds dive, the impact force of the water closes the operculum. [48]
1. A cup-shaped structure formed from bract s resembling an outer calyx. 2. In some Asteraceae, a circle of bracts below the involucre. calyptra A hood or lid. See operculum. calyx. pl. calyces. Collective term for the sepal s of one flower; the outer whorl of a flower, usually green. Compare corolla. calyx tube
In flowering plants, the operculum, also known as a calyptra, is the cap-like covering or "lid" of the flower or fruit that detaches at maturity. The operculum is formed by the fusion of sepals and/or petals and is usually shed as a single structure as the flower or fruit matures. [1] The name is also used for the capping tissue of roots, the ...