circulatory system - 3 - the heart

Circulatory system
par 3 - the heart
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Cette leçon contient 27 diapositives, avec quiz interactifs, diapositives de texte et 1 vidéo.

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Circulatory system
par 3 - the heart

Slide 1 - Diapositive

Arteries
Capillaries
Veins

Slide 2 - Question de remorquage

Which type of blood vessel has a high blood pressure?
A
Arteries
B
Veins
C
Capillaries
D
Veins and capillaries

Slide 3 - Quiz

When is blood 'deoxygenated'?
A
When the concentration oxygen is low and the concentration carbon dioxide high
B
When the concentration of oxygen is high and the concentration of carbon dioxide high

Slide 4 - Quiz

Which blood cells make sure blood cloths?
A
Phagocytes
B
Lymphocytes
C
Red blood cells
D
Platelets

Slide 5 - Quiz

The heart 
- is a double pump
 - left side pumps oxygen rich
    blood (red) towards your
    body
- right side pumps oxygen
   poor blood (blue) towards
   your lungs 

Slide 6 - Diapositive

left = right
Yes, in the picture the left side is blue - this indicates oxigen poor blood, but actually it is the right side of the heart
We always see the heart from the front, but we consider it our own heart.
When I raise my right hand, you will not say that it is my left hand...

Slide 7 - Diapositive

Slide 8 - Diapositive

The heart
- four chambers
- 2 atria
- 2 ventricles

Blood always enters the heart via an atrium

Slide 9 - Diapositive

Bloodflow
Bloodflow in the heart is a 
one-way street.
It follows the direction of the arrows

Slide 10 - Diapositive

Circulation
Pulmonary circulation
From the heart to the lungs


Systemic circulation
From the heart to every part of your body

Slide 11 - Diapositive

Systemic circulation
To every part of your body to drop of oxygen and nutrients and pick up carbondioxide and other waste products


 

Slide 12 - Diapositive

How is it possible that blood only flows one way?
Because:
A
of the blood pressure
B
blood cells know how to flow
C
there are valves
D
how the heart contracts

Slide 13 - Quiz

Valves
Valves only open in one way,
just like a door, if you push from one side the door opens easily, but if you push from the other side you will push it even closer...

Slide 14 - Diapositive

one way valve
As you can see, a valve only opens in one direction

Slide 15 - Diapositive

Slide 16 - Diapositive

Slide 17 - Diapositive

cardiac cycle
- atria contract, blood flows into 
   ventricles (atrial systole)

- ventricles contract, blood 
   flows into aorta and pulmonary 
   artery (ventrical systole)

- Heart relaxes, blood flows 
   into atria (diastole)

Slide 18 - Diapositive

Slide 19 - Vidéo

Coronary blood vessel
Like everything else in the body, the heart needs oxygen. It gets oxygen through its own blood vessels. 
Those come from the aorta --> coronary arteries.
 When has brought oxygen to the heart muscle, the deoxygenated blood goes back the right atrium. 
The vessels that bring blood back are called coronary veins.

Slide 20 - Diapositive

Slide 21 - Lien

Put the texts underneath the corresponding picture.
Cardiac pause - heart fills with blood
Atria contract
Cardiac pause - heart fills even more with blood
Ventricles contract
Blood flows into arteries

Slide 22 - Question de remorquage

The heart pumps oxygen rich blood into the?
A
Superior vena cava
B
Pulmonary arteries
C
Aorta
D
Aorta and pulmonary arteries

Slide 23 - Quiz

Look at the picture. You see the coronary artery being blocked causing a heart attack. Explain in your own words what happens with a heart attack.

Slide 24 - Question ouverte

Slide 25 - Diapositive

Slide 26 - Diapositive

Homework
study par3,3 - the heart
learn 3.1 to 3.5 
do ex 10,11,12,15,16

Slide 27 - Diapositive