2TTO U3: basics 5 Cardiovascular diseases

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Lesson plan 25-01

-Review questions of basics 4

-discuss homework ex. 18, 19 and 22

-discuss basics 5:  .

-Questions about cardiovascular diseases.

On the picture right you see:

1. An artery on the right. A vein on the left.
2. Both are arteries.
3. An artery on the left. A vein on the right.
4. A capillary on the left. An artery on the right.

Muscle pumps:

1. Help arteries bring blood back to the heart.
2. Help veins bring blood back to the heart.
3. Help capillaries transport nutrients to organs.
4. All of the above.

The vessel on the left is a(n):

1. Vein
2. Capillary
3. Artery
4. Impossible to tell.

Which type of blood vessel has the highest blood pressure?

Goals:

-I can describe the connection between high blood pressure and diet on the risk of cardiovascular disease.

-I can describe 2 ways of solving a blockage of a blood vessel.

-I can recognise a stroke from the physical warning signs.

Homework b

-Discuss exercises 18, 19 and 22.

B5: cardiovacular diseases

-Blood pressure: high or low.

-Blockages: heart attack; stroke etc.

Low blood pressure

-Usually not much of a problem.

-Dizzyness; fainting; fatigue; light headaches.

High blood pressure

-Walls of arteries develop tears.

-Cholesterol (fat) builds up in tears. 

-nosebleeds; severe headaches; problems with vision.

Blockages

-A blood clot or cholesterol plaque(prop) blocks a blood vessel.

-Cells of affected organ do not receive nutrients+ O2. Waste products also build up.

Blockages

-Blockage in coronary artery: heart attack.

-Blockage in brain capillary or carotid artery(halsslagader): stroke.

-Blockage in lung: Pulmonary emboly

Causes

-Unhealthy diet: 

-Lots of fatty foods increase cholesterol level in blood.

-Too much salt increases blood pressure.

-Smoking causes constriction of vessels, which increases damage to arterial walls.

-Not enough exercise: higher blood pressure and weight.

-Genes which increase cholesterol level.

Medical solutions

(balloon) Angioplasty (with stent):

-insert balloon to widen artery. Place 'cage' to keep it open.

Bypass surgery (worst case scenario).

-Insert a vein from elsewhere in the body, around the blockage.

A person is speaking, but words sound strange. They also cannot move one of their arms. The problem is probably:

Smoking has a bad effect on blood vessels. It makes them:

A diet with too much salt directly causes:

1. A heart attack.
2. Low blood pressure.
3. A stroke.
4. High blood pressure

A blockage is most dangerous in a:

1. A large artery.
2. An oxygen rich capillary.
3. A large vein.
4. An oxygen poor capillary.

homework basics 5

-Do exercises 25 & 26