| A | B |
|---|
| bolus 小团 | ball of food |
| saliva 唾液 | water made by the mouth |
| amylase (ptyalin) 唾液里的消化酶 | It breaks down starch. It's in the saliva. |
| enzyme 酵素 （帮助消化加快） | It makes digestion faster. |
| mechanical digestion 机械消化 (嚼或搅拌 | chew food into small pieces |
| chemical digestion 化学消化 (淀粉变成糖 | change starch into sugar |
| sugar 糖 | It's sweet. simple carbohydrates |
| starch 淀粉 | It's from rice or bread. complex carbohydrates |
| sphincter 环状肌肉 | ring-like muscles |
| peristalsis 肌肉收缩 | muscle contractions that move food |
