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In human brain anatomy, an operculum (Latin, meaning "little lid") (pl.: opercula), may refer to the frontal, temporal, or parietal operculum, which together cover the insula as the opercula of insula. [1] It can also refer to the occipital operculum, part of the occipital lobe.
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 ...
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In antiquity the operculum was used as an ingredient in incense. The Babylonian Talmud recorded that onycha was rubbed with an alkali solution prepared from the bitter vetch to remove impurities, [5] it was then soaked in the fermented berry juice of the Caper shrub, [6] or a strong white wine, in order to enhance its fragrance.
A bony flap that covers the gills; another name for the operculum. gill filaments A series of projections along the posterior edge of the gill arch, the site of gas exchange. gill membranes Membranes covering the gill openings, attached to the branchiostegals. gill opening The opening behind each operculum, leading to the gills. gill rakers
An operculum is a somewhat similar but permanent anatomical feature that is found in other clades of gastropods. The operculum serves some of the same functions as an epiphragm. Sometimes it protects the snail against predation. It protects certain species of snail if they are eaten by birds (such as Japanese white-eye). The snail can remain ...
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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. An 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 ...