Body plan of a cuttlefish

1: gonad; 2: stomach; 3: shell (cuttlebone); 4: mantle; 5: eye; 6a: long tentacles; 6b: short tentacles; 7: heart; 8: gill; 9: mantle cavity (pallial cavity); 10: ink gland; 11: anus; 12: funnel (sipho); 13: radula; 14: beak; A: live image; B: internal shell (cuttlebone).

Source: Encarta Encyclopedia Online.