1. Staying Alive: Breathing, Respiration and Blood
Oxygen and the lungs
Blood and guts!

2. Staying Alive
Respiration

3. Match the word to its correct meaning:
8B Energy words
Match the word to its correct meaning:
1 respiration
2 oxygen   
3 carbon dioxide
4 water
5 energy
6 transport systems
D the process that releases energy from food.
C is needed to release energy from glucose in the body. 
A is a poisonous by-product of respiration.
E is made when energy is released from food.
F is needed to do anything.
B take materials to and from respiring cells.
A is a poisonous by-product of respiration.
B take materials to and from respiring cells.
C is needed to release energy from glucose in the body.
D the process that releases energy from food.
E is made when energy is released from food.
F is needed to do anything.

4. We all need energy to do anything.
8B Who needs energy anyway?
We all need energy to do anything.
We also need energy to make things like new body cells, or hair.
What do you use most of your energy to do?

5. Make a list starting with the one needing the most energy.
8C Who needs the most energy?
Sort these 25-year-old women into an order based on the amount of energy they need every day.
Make a list starting with the one needing the most energy.
Office worker
Nurse
Athlete
Pregnant woman
Breastfeeding mother

6. 8B How did you do?

7. 1. Respiration means breathing.
8B Respiration – the truth, and quite few lies
True or false?
1. Respiration means breathing.
2. Respiration occurs in all body cells.
3. Respiration gives out oxygen.
4. Carbon dioxide is used up by respiration.
5. Respiration is a chemical process that releases energy.
6. Plants do not respire.
FALSE
TRUE

8. 1. Respiration releases energy from glucose.
8B Respiration – the truth, and quite few lies
True or false?
1. Respiration releases energy from glucose.
2. Oxygen is needed for respiration in humans.
3. We die without oxygen because we cannot respire.
4. Respiration is a bit like burning.
5. People do not respire while they are asleep.
6. The more energy we need, the less we respire.
TRUE
FALSE

9. Respiration and combustion - same thing? Or not?
8B Respiration and combustion
Respiration and combustion - same thing? Or not?
Are these statements...
…only true about respiration? (R)
…only true about combustion? (C)
…true about respiration and combustion (R & C)
Needs a high temperature
(C)
Gives out light
(C)
Happens at room temperature
(R)
Gives out heat
(R & C)
Needs enzymes to work properly
(R)
Uses oxygen
(R & C)
Gives out carbon dioxide
(R & C)

10. 8B Oxygen and the lungs
Oxygen and the lungs

11. The lungs have two jobs:
8b So what are the lungs for?
The lungs have two jobs:
1 to collect oxygen from the air
2 to deliver carbon dioxide to the air
This means that they need
1 a large surface area for this swapping of gases to take place
2 ways to prevent the surfaces being clogged up with dust from the air
3 a good blood supply and circulatory system to move things around the body.
How many times do you breathe in a minute?

12. Breathing is the movement of air in and out of the lungs.
8B Respiration is the same as breathing? No?
Breathing is the movement of air in and out of the lungs.
You can see people breathing and it’s one of the first things a doctor looks for to see if someone is alive.
Respiration is a chemical reaction going on inside all living cells.
It releases energy from glucose to keep the body alive.

13. 8B Breathing system

14. 8B Blood and guts!
Blood and guts!

15. 8B Blood cells
Red blood cells carry oxygen. They are packed full of a chemical called haemoglobin.
There’s no nucleus!
White blood cells fight infection. There are a few different types of white blood cells.
Platelets - they help the blood to clot.
Plasma - the yellowish liquid that all of the cells float around in. It contains lots of dissolved substances to keep cells healthy.

16. 8B Getting it around the body

17. Match the two halves of these sentences:
8B Matching
Match the two halves of these sentences:
1 We breathe in air containing...
2 Air gets to the air sacs through...
3   Oxygen passes from the air sacs to...
4 Oxygenated blood leaves the lungs through...
5 Deoxygenated blood enters the lungs through...
6 The air we breathe out has...
F …lots of oxygen but very little carbon dioxide
C …the wind pipe and bronchi  
B …the blood
E …the pulmonary vein
D …the pulmonary artery
A …less oxygen and more carbon dioxide
A …less oxygen and more carbon dioxide
B …the blood
C …the wind pipe and bronchi
D …the pulmonary artery
E …the pulmonary vein
F …lots of oxygen but very little carbon dioxide

18. 1. Animals respire because… a) they need energy b) they live on land
8B Respiration check
1. Animals respire because…
a) they need energy
b) they live on land
c) to cool down.
2. Plants respire…
a) only at night
b) only during the day
c) all the time.

19. 3. Which of these is true about combustion but NOT about respiration?
8B Respiration check
3. Which of these is true about combustion but NOT about respiration?
a) It gives out energy.
b) It gives out light
c) It gives out heat.
4. We take in oxygen through…
a) our skin
b) our gut
c) our lungs.

20. 5. Carbon dioxide is made… a) in all body cells b) only in the lungs
8B Respiration check
5. Carbon dioxide is made…
a) in all body cells
b) only in the lungs
c) everywhere except the brain.
6. Red blood cells are red…
a) because they contain haemoglobin
b) because they contain glucose
c) to show up when we cut ourselves.

21. a) from the heart to the cells b) from the cells to the heart
8B Respiration check
7. Arteries take blood…
a) from the heart to the cells
b) from the cells to the heart
c) from the lungs to the heart.
8. The lungs have a good blood supply to…
a) let oxygen and carbon dioxide move in and out quickly
b) keep them warm
c) store blood until it is needed by other parts of the body.

22. Complete the table below.
8B Respiration everywhere
Complete the table below.
Gaseous exchange means taking in one gas and giving out another gas.
Organisms
Do they breathe?
Do they carry out gaseous exchange?
Do they respire?
Fish
Bacteria
Earthworms no
yes
yes no
yes
yes no
yes
yes
Why does it always say ‘yes’ in the respiration column?