Digestion

Question 1

what does digestion do

Answer 1

turns large insoluble substances into small soluble ones

Question 2

what do the organs of the digestive system produce

Answer 2

enzymes ( chemicals that break up food)

Question 3

what is ingestion

Answer 3

putting food in the mouth

Question 4

what do teeth do

Answer 4

grind up food and mix it with saliva

Question 5

what does saliva contain

Answer 5

enzymes

Question 6

where is food swallowed down

Answer 6

the gullet (food pipe)

Question 7

what do the muscles above the food do

Answer 7

the muscles contract (get smaller) pushing the food down

Question 8

what does the large intestine do

Answer 8

removes water from the food that cant be digested

Question 9

what are faeces formed from

Answer 9

food that cannot be digested

Question 10

where are faeces stored

Answer 10

in the rectum

Question 11

what is saliva produced by

Answer 11

salivary lands

Question 12

what does saliva break starch down in into

Answer 12

sugar

Question 13

what happens in the stomach

Answer 13

strong acid is added to the food to break down proteins into amino acids

Question 14

what does stomach acid break proteins into

Answer 14

amino acids

Question 15

what happens in the small intestine

Answer 15

more digestive juices are added

Question 16

what does carbohydrates digest into

Answer 16

sugars

Question 17

what happens to sugar and amino acids in the small intestine

Answer 17

they are small so can be taken into the blood stream in the small intestine. the food substances are absorbed

Question 18

what is elimination/egestion

Answer 18

faeces pushed out of the anus

Question 19

what helps the small intestine absorb food

Answer 19

the wall is thin and covered with villi. these increase the surface area.

Question 20

how are digested food substances carried round the body

Answer 20

by the circulatory system

Question 21

where does blood travel through

Answer 21

blood vessels

Question 22

what carries blood away from the heart

Answer 22

arteries

Question 23

what carries blood to the heart

Answer 23

veins

Question 24

what are the smallest blood vessels

Answer 24

capillaries

Question 25

where do cells in tissues get there substances from

Answer 25

the tissue fluid

Question 26

where does tissue fluid leak out of

Answer 26

the capillaries

Question 27

what do cells need food substances for

Answer 27

to release energy

to make new substances

Question 28

how do cells release energy

Answer 28

by using a chemical reaction called respiration to release energy from a sugar called glucose