Digestion

Question 1

List the organs of the digestive tract in order from the start to the finish

Answer 1

Mouth, oesophagus, stomach, duodenum, large intestine, small intestine, anus

Question 2

List the organs that are part of the digestive system but not part of the digestive tract

Answer 2

Liver, pancreas, and gall bladder

Question 3

State how the liver, pancreas and gall bladder contribution to digestion

Answer 3

Liver - produces bile which is responsible for the chemical digestion of fats. Liver also removes toxins such as alcohol
Pancreas - produces pancreatic juice which contains chemicals that help digest carbohydrates, fats and proteins
Gall bladder - ?

Question 4

Name 3 disorders of the digestive system (4 included)

Answer 4

Vomiting
Diarrhoea
Appendicitis
Heartburn

Question 5

Describe the process of peristalsis

Answer 5

The rhythmic contracting and relaxing of the muscles of the oesophagus that keeps food moving through the digestive system

Question 6

Explain how the structure of the following organs make them well suited to the job they do:
Stomach
Small intestine

Answer 6

Stomach - mechanical and chemical breakdown of good. shaped like a bag, muscle walls contract and relax churning up the food (mechanical), mixes with gastric juices (chemical)

Small intestine- very long narrow tube. Responsible for digested food absorb into the body through tiny fingers called villi

Question 7

What happens to most of the harmful bacteria that enter the digestive system?

Answer 7

Killed by the hydrochloride acid in gastric juice

Question 8

Describe what can happen if too many harmful bacteria enter the system?

Answer 8

Vomiting and Diarrhoea will expel them