1. In which part does digestion begin? Aanus B.mouth Cintestine D. esophagus 2. Which of the following bones protects the lungs? A. ribs B. clavicle C. scapula D. sternum 3. Where is food finally digested and absorbed? A. mouth B. esophagus Clarge intestine D.small intestine 4. Which one of the following is NOT a primary function of the integumentary system? A. secretion B. protection C. sensation D. reproduction 5. Which is affected when a person suffers from first degree burns? A.dermis B. epidermis D. subcutaneous layer C.excoriation​