1. The heart
Aim
Be able to relate the structure
of the heart to its function.
Be able to describe how diet can
lead to coronary heart disease.

2. Heart pumps the blood
round two separate circuits.
One circuit connects
heart to the lungs.
The other circuit connects the
heart to the body tissues.

3. Left
Right
Pulmonary
artery aorta
Vena cava
Pulmonary vein
Right atrium
Left atrium
Tricuspid Bicuspid valve
valve
Right ventricle
Semi-lunar
valves
Left ventricle

4. Left
Right
1
6
2
7
3
8
4 9
5
10
11

5. Lesson objective
• Revise the heart
• Look at heart disease
• Heart transplants
• Investigate blood pressure and discuss
factors affecting blood pressure.

6. Heart disease
Coronary heart
disease is the largest
cause of death in this
country
Large amounts of saturated
fats in the diet increase the
level of cholesterol in the
blood
Some of this extra
cholesterol is laid down in
arteries forming a plaque.

7. Coronary arteries
supply the cardiac
(heart) muscle with
oxygen.
If coronary arteries
are blocked, the muscle
is starved of oxygen
and dies.
Coronary
arteries
This is what happens during a
heart attack

8. This plaque may
restrict blood flow.
Causing chest pains
(angina)
The plaque may break
away.
And completely block a
narrower coronary
artery causing a heart
attack.

9. Heart transplants
• Why might you need one?

10. • B What is the purpose of the valves in the heart?
• B What is the amount of cholesterol in arteries
linked to?
• B State problems in supply of donor hearts
• B What are other problems with transplants
• A Explain the advantage of the double
circulatory system in mammals.
• A Describe how cholesterol can build up to form
a plaque which can restrict or block blood flow in
arteries ( you could do this as a diagram)

11. Learning objective
• To understand how blood pressure can be
used to indicate health
• To understand the term ‘systolic’ and
‘diastolic’
• To know why we have a double circulatory
system

14. Blood pressure
• Look in the book at page
• What do Systolic and Diastolic mean
• Fill in the sheet
• Look at lifestyle answer the questions in
the book
• Learning questions

15. Objectives
• What are the health problems associated
with high and low blood pressure?
• Fitness and health
• Learn about the blood and blood vessels

16. • High blood pressure causes….
• Can be reduced by…….
• Low blood pressure causes…….
• The difference between fit and healthy
is….

17. 1. Do you think the kind of blood pressure monitor being used by your
teacher is as accurate as the equipment used by doctors? Explain your
answer.
2. If someone who took their blood pressure using one of these devices got
a high reading, what should they do next?
3. Some doctors ask their patients to take their blood pressure at home
because they suspect the person has ‘white-coat high blood pressure’.
What do you think this means?
4. Which body organ puts the blood under pressure?
5. Look at the blood pressure questionnaire on page 17 in the student
book, which Joe’s father is asked to fill in.
6. What changes should Joe’s father make to his lifestyle?
7. Complete the questionnaire for yourself. What changes, if any, do you
think you need to make to your lifestyle?

18. • A* What are the possible consequences of
high blood pressure?
• A Why does regular exercise help to lower
blood pressure?
• B What does mmHg mean?
• C Why is it important for blood to reach all
parts of the body?

19. Heart transplants
• Why might you need one?

20. What are the difficulties?
• http://news.bbc.co.uk/1/hi/health/5041054.
stm
• Rejection
• Not enough hearts for all the people who
need them
• Transporting the hearts

21. What is in blood?
• What do you think is in the blood?
• Look at the animation and video.

23. • Haemoglobin + Oxygen  Oxyhaemoglobin
• Haemoglobin carries the oxygen in the red blood
cells.

24. What is in blood?

25. • Blood vessels
• Arteries
• Veins
• Capillaries
• Use the book to fill in the table.