Digestive System Overview

Question 1

2 groups of digestive organs

Answer 1

1. alimentary canal (gastrointestinal tract)

2. accessory digestive organs

Question 2

accessory digestive organs (6)

Answer 2

• teeth
• tongue
• salivary glands
• gall bladder
• liver
• pancreas

Question 3

alimentary canal organs (7)

Answer 3

• mouth (oral cavity)
• pharynx (throat)
• esophagus
• stomach
• small intestine
• large intestine
• anus

Question 4

4 main functions of digestive system

Answer 4

1. ingestion
2. digestion
3. absorption (nutrient intake)
4. defecation

Question 5

ingestion

Answer 5

when food enters mouth

Question 6

digestion

Answer 6

food breakdown - mechanical & chemical - into nutrients that body can absorb

Question 7

absorption

Answer 7

moving nutrients from digestive food into blood stream

Question 8

defecation

Answer 8

excretion of indigestible food from anus

Question 9

where ingestion occurs

Answer 9

mouth

Question 10

where mechanical digestion occurs

Answer 10

mouth (teeth, tongue)

stomach (muscularis externa causes churning/mixing)

Question 11

where chemical digestion occurs

Answer 11

mouth (salivary amylase)

stomach (gastric juices & parietal cells –> enzymes)

Question 12

where absorption occurs

Answer 12

small intestine: absorption of fat, carbs, protein, water

large intestine: absorption of water, vitamins, ions

Question 13

where defecation occurs

Answer 13

large intestine: waste compacted into feces

rectum: feces travels from large intestine to anus
anus: feces excreted from body