Snails shrink in their shells. What kind of shells is a snail's body? 2. liver, 3. Lung, 4. Anal, 5. Breathing hole, 6. Eyes, 7. Tentacles, 8. Cerebral ganglia, 9. Salivary duct, 10, oral cavity, 1 1, and. 16, mucous gland, 17, fallopian tube, 18, sagittal sac, 19, foot, 20, stomach, 2 1, kidney, 22, mantle 23, heart, 24.