The Digestive System

Question 1

State some points about the liver

Answer 1

• it produces a green-yellowish liquid called bile
• bile does not contain enzymes
• it’s stores excess glucose
• it breaks down proteins into urea
• it breaks down harmful substances such as alcohol and drugs

Question 2

State some points about the gullet / oesophagus

Answer 2

• the muscles of the gullet wall contract and relax to push the food down into the stomach
• no enzymes are produced here

Question 3

State some points about the mouth and salivary glands

Answer 3

• the teeth are used to break down large pieces of food into smaller pieces
• the salivary glands secrete saliva
• saliva contains enzymes that digests starch
• The tounge rolls the food into the gullet

Question 4

What are the parts of the digestive system

Answer 4

• mouth
• gullet / oesophagus
• stomach
• small intestine
• large intestine
• rectum and anus

Question 5

State some points about the stomach

Answer 5

• it is a muscular sac
• it mashes up food into a liquid mixture
• it produces a digestive juice that contains acid and enzymes
• the acid kills the bacteria in food
• the enzymes helps to digest protiens
• the food later leaves bit by bit into the small intestine

Question 6

what are some points about the small intestine

Answer 6

• it receives the digested food from the pancreas and bile from the gall bladder
• it also receives digestive enzymes
• different enzymes in the small intestine helps to speed up digestion of nutrients until the food is completely digested
• the digested food is absorbed through the walls of the small intestine into the blood stream and carried to all parts of the body
• digestion stops here

Question 7

what are some points about the gall bladder

Answer 7

• bile which is produced by the liver is stored in the gall bladder
• it releases bile into the small intestine

Question 8

what are some points about the pancreas

Answer 8

• it produces enzymes that digests carbohydrates , protein and fats
• it also releases some enzymes into the small intestine

Question 9

what are some points about the large intestine

Answer 9

• no digestion happens here
• excess water , vitamins and mineral salts are absorbed through the walls of the large intestine and into the blood stream
• the undigested food moves to the rectum and anus

Question 10

what are some points about the rectum and anus

Answer 10

• the digested food is stored in the rectum
• the faeces leaves the body through the anus
• no digestion occurs here

Question 11

what is faeces

Answer 11

faeces refers to the undigested food

Question 12

what is the digestive system

Answer 12

it is the physical way of digesting food by breaking down large pieces of food into smaller and simpler pieces

Question 13

which of the 3 parts does the food not go through

Answer 13

liver , gall bladder and pancreas