(i)

Glands associated with the alimentary canal of humans

1. Salivary gland
2. Gastric gland/stomach
3. Pancreas/Exocrine gland
4. Liver/gall bladder
5. Stomach
6. Small intestine/Lieberkuhn gland
7. Duodenum/Brunner's gland

(ii)

List the substance secreted by each of the glands named in (b(i).

1. Salivary gland - saliva/mucus/water/ptyalin/amylase
2. Gastric gland/stomach - hydrochloric acid/digestive enzymes (pepsin,renin)/gastric juice
3. Pancreas/Exocrine gland - Pancreatic juice/digestive enzymes(protease,lipase,amylase,hormone/insulin)
4. Liver/gall bladder - bile
5. Stomach - gastric juice/hydrochloric acid
6. Small intestine/Lieberkuhn gland - digestive enzyme
7. Duodenum/Brunner's gland - digestive enzyme

(i)

Causes of indigestion in humans

1. Irregular eating times
2. Heavy smoking
3. Over eating
4. Improper chewing of food/eating food too fast
5. Excessive alcohol intake
6. Stress/fatigue/anxiety/emotional trauma
7. Too much caffeine intake
8. Constipation
9. Disease condition (or named disease)
10. Reduced blood flow in the intestine
11. Obesity
12. Sleeping immediately after eating

(ii)

Ways of preventing tooth decay

1. Avoiding eating too much sugary food/sweets
2. Brushing teeth after meals/regularly (or twice a day)
3. Regular dental check-up
4. Avoid activities leading to aches/bleeding of mouth
5. Regular brushing of the tongue
6. Daily flossing
7. Use of antibacterial mouthwash
8. Use of fluoride tooth paste