19. Coronary Heart Disease

Prep (Monday, Tuesday)

• Read sheet, ‘How does the blood get around?’• Write a letter to the Roman physician (doctor), Galen, to tell him how blood really gets around the body.

Check/collect prep (Monday, Tuesday)

• Record of Achievement

Return/debrief exam

Debrief not necessary?

Tick off ‘Checklist’

StarterSS8 P71 Q3

Sometimes our arteries get ‘furred up’.

This is because a fatty substance sticks to the inside of the artery and makes it narrower.

How do you think this would affect the flow of blood in the artery?

Coronary Heart Disease

3rd June, 2016

Learning Objectives

Able to:

• Explain what is meant by a heart attack

• List the things that can increase the risk of a heart attack, and know how to reduce these risks

The Heart Needs a Blood Supply Too!

What would happen if any of these arteries ‘clogged up’?

What could cause this to happen?

The Big Killer• Heart disease is one

of the biggest killers in Britain.

• It killed 124,000 each year in Britain (2002)

• Each year 120,000 Britons suffer a stroke.

• This kills 60% of those affected.

COPD = Chronic Obstructive Pulmonary Disease

Rise of dementia

Top five killers, 2014

Furred up arteries

Risk Factors for Heart Attack

3-D printing of heartKing’s College, London. 2015

Tasks• Answer Qs 3 and 4 on p73 of SS8 (sentences!)

1st sound: tricuspid and mitral valves closing at systole.

2nd sound: aortic and pulmonary valves closing (sometimes heard as 2 sounds) (see next slide)

Answer Qs ‘g’ and ‘h’ (sentences).

Heart Videos• https://www.youtube.com/watch?v=FGYFsj9gEpg..• Video 1 = Levels 3-5• Video 2 = Levels 4-6.

• The second video talks about valves, and gives the names of the blood vessels entering and leaving the heart.

• Use this information to label your heart diagram.

Answer to Q2As blood passes from the main vein to the main artery it…• Enters the top right chamber, and passes from there into…• The lower right chamber, from where it is…• Pumped to the lungs through an artery (a valve prevents the

blood from being pumped backwards to the upper right chamber).

• The blood is oxygenated in the lungs and returns to the top left chamber of the heart through a vein.

• It then passes through a valve into the lower left chamber, which pumps it powerfully through the main artery to go…

• Around the body (the valve prevents it from going backwards to the lungs).

So, what are the proper names of the chambers, artery and veins? Watch videos…