1. 脊椎   gums   lung   stomach   spine   Hint Half-n-half Clue   2. 头骨   stomach   gums   skull   nerves   Half-n-half Clue   3. 脑子   veins   stomach   brain   heart   Half-n-half Clue   4. 胃   stomach   skull   brain   veins   Half-n-half Clue   5. 肌肉   muscle   skull   kidney   nerves   Half-n-half Clue   6. 肝脏   brain   liver   skull   lung   Half-n-half Clue   7. 血液   blood   muscle   spine   bone   Half-n-half Clue