Digestive system

Question 1

What is the role of the digestive system?

Answer 1

the role of the digestive system is to break food down to molecules which can be absorbed into blood

Question 2

What is physical digestion?

Answer 2

To physically digest something means to physically break food down into smaller pieces

Question 3

What is an example of a physical digestion

Answer 3

biting and chewing

Question 4

What is chemical digestion?

Answer 4

is when enzymes and acids break food particles all the way down into nutrient molecules so they can be absorbed into the blood stream

Question 5

where does chemical digestion happen?

Answer 5

Chemical digestion occurs int he stomach and small intestines

Question 6

What are the three main types of nutrient molecules?

Answer 6

Carbohydrates, Protein and fats

Question 7

What does mastication do?

Answer 7

It increases the surface area/ volume ratio of the food as well as making it easier to swallow

Question 8

What does saliva contain

Answer 8

Saliva contains a chemical enzyme called amylase

Question 9

What is the role of saliva?

Answer 9

Saliva moistens the food- making it easier to swallow

Question 10

What are the teeth used for?

Answer 10

Used to bite and chew your food to break it down into smaller pieces

Question 11

Salivary glands

Answer 11

Make about 1.5 liters of saliva each day

Question 12

Epiglottis

Answer 12

A flap of tissue closes off your trachea (windpipe) so that food doesn’t go down to your lungs and causes you to choke

Question 13

Tongue

Answer 13

involved in rolling food into a round ball (bolus) that is than pushed to the back of your mouth to be swallowed

Question 14

Oesophagus

Answer 14

it carries the food to the stomach

Question 15

Gall bladder

Answer 15

bile made in the liver is stored here

Question 16

Bile

Answer 16

breaks up fat into droplets small enough to be transported to the rest of the body

Question 17

Liver

Answer 17

controls blood sugar, destroys poison , stores vitamin A, D and iron

Question 18

Pancreas

Answer 18

make pancreatic juice which is alkaline so it neutralizes the stomach acid

Question 19

Stomach

Answer 19

is a temporary food storage area which can expand to hold between 2 and 4 liters of food

Question 20

Small intestines

Answer 20

the small intestine makes enzymes that complete all the digestion process

Question 21

Large intestine

Answer 21

Undigested material passes. as the material is pushed through it by peristalsis, water, salts, vitamins and any remaining sugars

Question 22

Rectum

Answer 22

The final part of the digestion process