1. Digestive system
  2. Respiratory system
  3. Circulatory system
  4. Reproductive system
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1 Answers

Option 1 : Digestive system

Buccal cavity:
  • a portion of the oral cavity bounded by the lips, cheeks, and gums
  • is a component of the “digestive system” as the intake of food for digestion takes place through this 
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