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Flashcards in Biology Deck (33):
1

What do our Teeth do?

Physically break down food

2

What do the Salivary Glands do?

Contains Amylease which break down food

3

What does the tongue do?

Rolls food into a small ball called Bolus

4

What does the Epiglottis do?

Seals the Oesophagus so we don’t choke when we eat

5

What does the Oesophagus do?

Bolus pushes through the Oesophagus by muscle contractions (peristalsis)

6

what does the Gall Bladder do?

Stores bile

7

What does the liver do?

Makes Bile and secretes it to the the small intestine to digestfood and removes toxins like paracetamol

8

What does the Pancreas do?

Makes and secretes enzymes to the small intestine

9

What does the stomach do?

Food is churned by muscle contractions then is broken down by enzymes

10

What does the small intestine do?

Amylease, Protease and Lipase break down food into molecules so they can be absorbed

11

What does the large intestine do?

Water and other nutrients are absorbed by the body

12

What does the rectum do?

Faeces are started before being excreted by the anus

13

What does the anus do?

excretes Waste

14

What does the villi do?

Shaped like fingers to maximize surface area to absorb more nutrients which are then sent to cells through the bloodstream

15

What is another name for the digestive system?

Alimentary Canal

16

What is peristalsis?

Involuntary muscle contractions

17

Explain the flow chart representing the path food takes through the digestive system

Mouth to Oesophagus to stomach to small intestine to large intestine to rectum to anus

18

What is the difference between chemical and physical digestion?

Mechanical digestion is the physical breakdown of food into smaller pieces like when you chew food. Chemical digestion is the breakdown of food by chemical reactions, an example is enzymes

19

Why are Villi shaped like fingers?

To maximize surface area to absorb nutrients efficiently

20

How does food move through the Oesophagus, small intestine and large intestine?

Through peristalsis, food is pushed through these organs

21

What is a bolus?

A ball of food rolled up by your tongue

22

What enzyme is found in saliva and what does it do?

Amylease and it turns starch into glucose and breaks down carbs

23

What is an enzyme?

A protein that speeds up chemical reactions

24

How do enzymes work?

The substance that enzymes break down is called a substrate, the resulting substance is called the product. The enzyme remains unchanged at the end of the process

25

What happens if an enzyme is hot or cold?

Good cold and they will operate very slowly, too hot and they can change shape

26

What are the three types of blood cells and what do they do?

Red blood cells carry oxygen around the body, white blood cells fight disease and platelets are involved in the clotting process

27

What happens at the body capillaries?

Oxygen transported to cells and carbon dioxide is removed from cells

28

What is the heart made out of

Cardiac muscle

29

What is cellular respiration?

The process cells undergo to make energy.
Glucose + Oxygen = Carbon dioxide + energy + water

30

How is skin involved in excretion

Excretes salts and water as sweat

31

How are the lungs involved in excretion

Excretes carbon dioxide (produced by cellular respiration)

32

How is the liver involved in excretion

Removes toxins such as paracetamol

33

How are the kidneys in excretion

Filter the blood to remove urea, salts or excess water