We present here a diagram that features many, many more details of a mollusk's anatomy than are called out in this requirement. See the features depicted in bold text are required - the rest are just additional information.
1. foot
2. cerebral ganglion
3. pneumostome
4. upper commissura
5. osphradium
6. gills
7. pleural ganglion
8. atrium of heart
9. visceral ganglion
10. ventricle
11. foot
12. operculum
13. brain
14. mouth
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 Drawing of a male Prosobranchia gastropod |
15. tentacle
16. eye
17. penis (everted, normally internal)
18. esophageal nerve ring
19. pedal ganglion
20. lower commissura
21. vas deferens
22. pallial cavity / mantle cavity / respiratory cavity
23. parietal ganglion
24. anus
25. hepatopancreas
26. gonad
27. rectum
28. nephridium
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Diagram showing the teeth of a mollusk
e = esophagus
m = mouth
mx = maxilla
o = odontophore
op = odontophore protractur muscle
r = radula (
teeth)
rp = radula protractor muscle
rr = radula protractor muscle
