oral groove


Also found in: Medical.

oral groove

[′ȯr·əl ¦grüv]
(invertebrate zoology)
A depressed, groovelike peristome.
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References in periodicals archive ?
Organelles such as the oral groove, which is the groove leading to the mouth; the cilia, tiny hair-like projections that paramecia use to facilitate movement; and food vacuoles, membrane-bound cavities that store and digest food, can all be observed.
Paramecia can expose students to many organelles that they wouldn't normally have the opportunity to see, such as oral grooves, food vacuoles, cilia, macronuclei, and, in some cases, trichocysts.
Even though almost 500 bacterial strains have been identified already, he believes this may be only a fraction of the bacteria living in this oral groove.