1. What does gastric juice help to convert?
2. What is the main function of teeth?
3. What are the two components of digestive
system?
4. What is oesophagus ?
5. Why does bread taste sweet when chewed
for some time?
6. Give one instant source of carbohydrate?
7. Where the digestion does starts?
8. What is not digested by human?
9. Name the glands present in the mouth.
10. Where is bile produced?
11. Name the process of taking in food?
12. What helps the food to taste it by our
tongue?
13. Name the largest gland in human body.
14. Which part of Amoeba helps in capturing
the food particles?
15. Name the organ that helps in nutrition in
Hydra?
16. Which organ is known as the food pipe?

The answer discusses the conversion process aided by gastric juice, the functions of teeth and tongue in digestion, and the components of the digestive system.

Explanation:

1. Digestive Substances In Duodenum:

Gastric juice aids in converting proteins into peptides and amino acids. When bread is chewed for a longer time, enzymes in saliva break down starch into sugar, leading to a sweet taste.

2. Functions of Teeth and Tongue:

The main function of teeth is mechanical digestion by breaking down food into smaller pieces, aiding in swallowing and digestion efficiency. The tongue assists in tasting food by detecting flavors and helps in pushing food towards the esophagus.

3. Components of Digestive System:

The two main components are the gastrointestinal tract and accessory digestive organs.

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