Answer:

1. How come a person lying upside down can still eat or drink?

2. Why is digestion considered as a mechanical and chemical process?

3. Why should you not talk when your mouth is full?

4. Identify the important roles of the following in digestion:

•Teeth. • Small intestine

• Stomach. •Large intestine

Explanation:

1. The muscles then contract quickly to stop the food or liquid from the stomach from seeping back into the esophagus or into the mouth.

2. To facilitate chemical digestion more effectively, mechanical digestion entails physically reducing meal components into smaller pieces.

3. As a result, when we eat, the mouth shuts, but when we talk, the epiglottis remains open, allowing food to enter the windpipe and cause a severe cough to expel it from the trachea or a more acute case of coughing that might be fatal. Talking while eating is not recommended because of this.

• TEETH-to chew food that we eat
• STOMACH-takes in food from the esophagus (gullet or food pipe), mixes it, breaks it down, and then passes it on to the small intestine in small portions.
• Small Intestine-helps to further digest food coming from the stomach.
• Large Intestine- to absorb water and salts from the material that has not been digested as food, and get rid of any waste products left over.