Activity 1A: Stomach at Work! Materials transparent plastic bag bread or any biscuits spoon calamansi juice 500 ml of water Procedures: 1. Slice the biscuits or bread into small pieces and place them inside the plastic bag. 2. Pour 500ml of water into the plastic bag. Tie the opening of the plastic bag. 3. Gently squeeze the plastic bag. Observe what happens. 4. Untie the plastic bag and add two tablespoons of calamansi juice to the mixture inside the bag. 5. Gently squeeze the plastic bag again for a few minutes. Observe what happens. Answer the following questions. 1. Which material in the activity represented the stomach? __________________________________________________________________________________ 2. What happened to the biscuits and the bread when you squeezed the plastic bag? __________________________________________________________________________________ 3. What happened when calamansi juice was added to the mixture and then you squeezed the plastic bag? __________________________________________________________________________________ 4. What is represented by the mixture of water, calamansi juice, and pieces of bread or biscuits? _________________________________________________________________________________ 5. Why does the stomach need to soften the food that we eat? __________________________________________________________________________________ 6. What do you call the action done by the stomach to turn the food into soluble materials? __________________________________________________________________________________ 7. What have you learned from the activity? ______________________________________________________________________________
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THE DIGESTION
Answer with Explanation:
1. Which material in the activity represented the stomach?
The plastic bag which is used in the activity represents the stomach.
2. What happened to the biscuits and the bread when you squeezed the plastic bag?
The biscuits and the bread slowly dissolve as the plastic bag is squeezed.
3. What happened when calamansi juice was added to the mixture and then you squeezed the plastic bag?
When the calamansi juice was added to the mixture while the plastic bag was squeezed, the calamansi juice helped hasten the dissolving process of the biscuits and bread.
4. What is represented by the mixture of water, calamansi juice, and pieces of bread or biscuits?
The mixture of water, calamansi juice and pieces of bread and biscuits represents the mixture of the food and water that we consumed which are being dissolved in the stomach with the aid of gastric and pancreatic juices.
5. Why does the stomach need to soften the food that we eat?
It is necessary for the stomach to soften the food that we eat because it will be easier for the small intestines to absorb the nutrients from the food we eat.
6. What do you call the action done by the stomach to turn the food into soluble materials?
The process that the stomach does in turning food into soluble materials is called digestion.
7. What have you learned from the activity?
From the activity, I learned that the stomach is an involuntary hollow muscular organ that softens the food that we eat. As we eat food and as long as they reach the stomach, they will be slowly broken down into more soluble parts with the help of pancreatic juices. Like the representation of calamansi juice, the pancreatic juices are acidic. The process that the stomach does to the food we eat is called the digestion process.
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