File:Scallop Diagram2.svg
From Infogalactic: the planetary knowledge core
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:54, 7 January 2017 | | 857 × 653 (5.88 MB) | 127.0.0.1 (talk) | Anatomical diagram of a <a href="https://en.wikipedia.org/wiki/Placopecten_magellanicus" class="extiw" title="en:Placopecten magellanicus">giant scallop</a>. Colors are close to those in an actual animal (digestive gland is black; adductor muscle is white; female gonad is orange, nerves are in yellow, etc.) though shown with greater than natural contrast for emphasis. Not shown are the left gill, the veins on the left side of the body, and the left shell or "<a href="https://en.wikipedia.org/wiki/bivalve_shell" class="extiw" title="en:bivalve shell">valve</a>". The hinge line corresponds to the animal's dorsal side, though when living it usually rests "sideways", on its right. The giant scallop is equilateral (i.e., symmetrical anterior-to-posterior) and very nearly equivalved (i.e., its left and right valves are close to the same size and shape), though this is not true of all or even most members of the class <a href="https://en.wikipedia.org/wiki/pectinidae" class="extiw" title="en:pectinidae">pectinidae</a>.<br>Features to note: the nervous system is centered around the visceral ganglia which constitute a kind of molluscan "brain"; the head-to-tail longitudinal axis reaches from the anterior ear to the middle of the adductor muscle, making only a very small portion of the animal morphologically the "front" and the rest corresponding to its "back"; the final loop of the intestine goes directly through the ventricle of the heart before it reaches its u-shaped terminus. |
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