Gastric shield

A gastric shield is an organ in the digestive tract of bivalves, tusk shells, and some gastropods against which a crystalline style typically rotates, in an action resembling that of a mortar and pestle. The gastric shield is permeated by microcanals which transmit digestive enzymes from the stomach, and serves to protect the cells of the stomach lining from the abrasive effects of the style.[1]

## References

1. ↑ Saleuddin, A. S.M.; Wilbur, Karl M. (1983). The Mollusca: Physiology, Part 2. Academic. p. 95. ISBN 9780323139212. https://books.google.com/books?id=9yvtRJkyhU4C&pg=PA95.

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Bivalve anatomy

Shell|

* Callus
* Hinge line
* Hinge teeth
* Ligament
* Lira
* Lunule
* Nacre
* Pallial line
* Pallial sinus
* Periostracum
* Prodissoconch
* Resilifer
* Resilium
* Sculpture
* Umbo
* Valve
* Beak
* Annuli

Other hard parts|

* Byssus
* Pearl
* Sea silk

Soft parts|

* Adductor muscles
* Ctenidium
* Gastric shield
* Mantle
* Nephridium
* Siphon

Other|

* Abductin
* Glochidium
* Pseudofeces
* Trochophore
* Veliger

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Gastropod anatomy

Shell|

* Aperture
* Apex
* Body whorl
* Callus
* Columella
* Lip
* Lira
* Nacre
* Periostracum
* Peristome
* Planispiral
* Plait
* Protoconch
* Sculpture
* Selenizone
* Siphonal canal
* Siphonal notch
* Spire
* Stromboid notch
* Suture
* Umbilicus
* Valve
* Varix
* Whorl

Other hard parts|

* Clausilium
* Love dart
* Operculum
* Pearl
* Radula

External soft parts|

* Caryophyllidia
* Caudal mucous pit
* Cerata
* Cnidosac
* Mantle
* Mentum
* Notum
* Parapodium
* Pneumostome
* Rhinophore
* Semper's organ
* Siphon
* Suprapedal gland

Internal soft parts|

* Circulatory system of gastropods
* Crop
* Ctenidium
* Digestive system of gastropods
* Diverticula
* Excretory system of gastropods
* Gastric shield
* Hancock's organ
* Hepatopancreas
* Hypobranchial gland
* Nephridium
* Nervous system of gastropods
* Nidamental gland
* Odontophore
* Oesophageal pouch
* Osphradium
* Reproductive system of gastropods
* Respiratory system of gastropods
* Sensory organs of gastropods

Other|

* Epiphragm
* Pseudofeces
* Torsion
* Circumesophageal nerve ring
* Trochophore
* Tyrian purple
* Veliger

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