Biology digestive system

Question 1

What is the digestive system?

Answer 1

It’s a group of organs that work together to break down food

Question 2

During digestion, … molecules are broken down into …. Molecules and pass into the ….

Answer 2

Large, small and bloodstream

Question 3

What does the mouth do in the digestive process?

Answer 3

Chews food and is mixed with saliva, teeth help break down food into smaller chunks

Question 4

What does the gullet do in the digestive system?

Answer 4

Food is passed down into the stomach

Question 5

What does the stomach do in the digestive system?

Answer 5

Food is mixed with digestive juices and acids

Question 6

What does the small intestines do in the process of digestion?

Answer 6

Digestive juices and pancreas are added and digestion is complete, small molecules can pass through the intestine wall into the bloodstream

Question 7

What does the large intestines do in the process of digestion?

Answer 7

Only food that isn’t digested reaches here, water passes back into the body leaving a solid waste of undigested food

Question 8

What is the solid waste of undigested food called?

Answer 8

Faeces

Question 9

What does the rectum do in the process of digestion?

Answer 9

Faces are stored here until they are ready to leave the body

Question 10

What does he anus do in the process of digestion?

Answer 10

It’s a muscular ring which the faeces passes out of the body

Question 11

What happens if you leave your faeces for too long in the. Body?

Answer 11

More water would leave the faeces which makes you have constipation

Question 12

What is diarrhoea?

Answer 12

When enough water hasn’t left the faeces

Question 13

What do the muscles do to make sure the fibre goes through the gut?

Answer 13

Pushes out the food, forcing it along the gut

Question 14

What foods prevent constipation?

Answer 14

Eating fibre-rich foods like fruits, vegetables and wholesome bread

Question 15

How does food go into the blood?

Answer 15

Small molecules of nutrient produce during digestion which passes into the bloodstream through the wall of the small intestines, the are then transported around the body

Question 16

What are the four adaptations of the small intestines?

Answer 16

The small intestine walls are thin so molecules can pass through easily
It’s covered with tiny structures called villi, these stick out of the wall and give it a large surface area for diffusion
Contain blood capillaries to carry away to absorbed food molecules
Rich blood supply to take nutrients where needed and maintain diffusion gradient