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Biology : Human Digestive / Gastrointestinal System I
Given the QUESTION, identify the ANSWER
1. Which of the following is a vestigeal organ?
Ο Appendix
Ο Ileum
Ο Caecum
Ο Gall Bladder
Appendix
Vestigeal organs: During the process of evolution, they have lost their function in some organisms, while they are still functioning in others. Appendix, external ear muscles and tail muscles are few examples of vestigeal organs in humans.
2. Villi are not found in
Ο Colon
Ο Duodenum
Ο Jejunum
Ο Ileum
Colon
Villi are finger-like projections in the walls of the small intestine. Due to the presence of villi, the surface area of the small intestine is tremendously increased. This aids in the process of absorption.
3. What type are teeth 1 and 2 in the following diagram? 
Ο Incisor
Ο Canine
Ο Molar
Ο Premolar
Incisor
4. Write the correct sequence, starting from the beginning.
Ο Ingestion, digestion, absorption, excretion
Ο Ingestion, absorption, digestion, excretion
Ο Excretion, absorption, digestion, ingestion
Ο Ingestion, digestion, excretion, absorption
Ingestion, digestion, absorption, excretion
5. Which of the following is not true regarding saliva?
Ο It doesn't have any role in swallowing of food.
Ο It contains digestive enzymes.
Ο It is secreted by salivary glands.
Ο It is a colorless fluid.
It doesn't have any role in swallowing of food.
Saliva helps in lubricating food and thus helps in swallowing.
6. Most of the water in the alimentary tract is absorbed through
Ο Large intestine
Ο Small intestine
Ο Stomach
Ο Esophagus
Large intestine
7. The process of digestion begins in the
Ο Mouth cavity
Ο Stomach
Ο Small intestine
Ο Esophagus
Mouth cavity
In the mouth cavity, food is churned and mixed with the saliva which contains digestive enzymes.
8. What type are teeth 7 and 8 in the following diagram?
Ο Molar
Ο Premolar
Ο Canine
Ο Incisor
Molar
9. Movement of the intestinal tract responsible for propelling the food downwards in the alimentary canal is known as
Ο Peristalsis
Ο Deglutition
Ο Emesis
Ο Excretion
Peristalsis
Peristaltic waves are the rings of contraction in the intestinal wall. They move forward resulting in propulsion of food.
10. Which of these is not a part of the small intestine?
Ο Rectum
Ο Jejunum
Ο Ileum
Ο Duodenum
Rectum
Small intestine is a coiled muscular tube, divided into three parts : duodenum, jejunum and ileum. Rectum is a part of the large intestine.
11. Find the odd one out.
Ο Thyroid
Ο Liver
Ο Pancreas
Ο Salivary Gland
Thyroid
Thyroid gland is not a part of the digestive system.
12. Absorbed food particles are distributed to the different parts of the body through lymph.
Ο True
Ο False
False
They are distributed through blood.
Given the QUESTION, identify the LABEL (ON DIAGRAM)
HUMAN GASTROINTESTINAL SYSTEM
13. Identify salivary gland in this diagram
Ο 6
Ο 10
Ο 13
Ο 3
3
There are three pairs of salivary glands: parotid, sublingual and submaxillary. The gland shown in this diagram is the submaxillary gland.
14. Food descends from mouth to stomach through this muscular tube.
Ο 2
Ο 9
Ο 5
Ο 6
9
It is known as the esophagus.
15. Identify the organ where bile is stored.
Ο 11
Ο 12
Ο 13
Ο 10
10
The gall bladder is a globular structure, which stores and concentrates bile. Whenever need for bile arises, it is discharged into the duodenum.
16. Identify the organ in which bile is secreted.
Ο 10
Ο 11
Ο 3
Ο 13
11
Bile is secreted in the liver.
17. Identify pancreas in this diagram.
Ο 13
Ο 10
Ο 11
Ο 3
13
Pancreas secretes pancreatic juice which contains digestive enzymes.
18. Identify the part where most of the ingested water is absorbed.
Ο 14
Ο 15
Ο 12
Ο 9
14
It is absorbed in the large intestine.
19. Identify the part where absorption of food occurs.
Ο 14
Ο 12
Ο 9
Ο 15
15
Most of the digested food is absorbed in the small intestine.
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