circulatory system - 3 - the heart

Circulatory system
par 3 - the heart
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Slide 1: Slide
BiologieMiddelbare schoolvwoLeerjaar 2

This lesson contains 14 slides, with interactive quiz and text slides.

time-iconLesson duration is: 30 min

Items in this lesson

Circulatory system
par 3 - the heart

Slide 1 - Slide

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

Slide 2 - Slide

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 3 - Slide

Slide 4 - Slide

The heart
- four chambers
- 2 atria
- 2 ventricles

Blood always enters the heart via an atrium

Slide 5 - Slide

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

Slide 6 - Slide

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

Slide 7 - Quiz

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 8 - Slide

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

Slide 9 - Slide

Slide 10 - Slide

Slide 11 - Slide

Slide 12 - Link

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 13 - Slide

study par3,3 - the heart
do ex 10,11,12,15,16

Slide 14 - Slide