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An operculum is a small covering or lid, and is widely used in descriptions of animals and plants. Operculum may refer to: In human biology: *Operculum (in pregnancy), the cervical mucus plug that blocks the cervix of the uterus after conception *Operculum (brain), the part of the brain covering the insula *Operculum (dentistry), a small flap of tissue which may cover an erupting or partially erupted molar In animal biology: *Operculum (animal), a structure resembling a lid or a small door that opens and closes * *Operculum (fish), a flap of the bony fish covering the gills * *Operculum (gastropod), a sort of trapdoor used to close the aperture of some snails * *Operculum (bird), a structure which covers the nares of some birds * *Operculum (bryozoa), a lid on the orifice of some bryozoans * * Operculum, the anterior end of the fruit fly puparium, through which the adult fly emerges In botany: *Operculum (botany), various lids and flaps pertaining to plants, algae and fungi == See also == *Dehiscence (botany), the opening of a plant structure, such as a fruit, anther, or sporangium, to release its contents. This sometimes involves an operculum. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Operculum」の詳細全文を読む スポンサード リンク
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