Unit 3 The circulatory system

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

Unit 3

The circulatory system:

3 The circulatory system

1 Blood

2 Blood circulation

3 The heart

4 Blood vessels

5 Cardiovascular deseases

6 Excretion

7 the immune system

• Bloodplasma
• water
• proteins
•  red blood cells, white bloodcells, platelets

• Red blood cells
• no nucleus
• haemoglobin: absorb and release oxygen 
• 5 milion in a cubic millimetre

• white blood cell
• bone marrow
• nucleus
• destroy pathogens
• engulfing
• pus; death white bloodcells and killed baceteria
• 7000 in a mm^3

• platelets  have no nucleus
• clotting: subtances make the blood solidifies
• Thrombosis

a good summary 

• headlines 
• skip lines
• lists, schematics
• keywords (use markers or underline them)
• drawings
• only facts
• short phrases or only words
• use colors or markers.
• good timemanagement 
• Efficienty and creativity 

Today

• Check together exercise 3 and 6
• Read 3.2 silent. 5 min.
• Discuss and draw 3.2: Blood circulation
•  Check and correct 3.1
• Make the exercises of 3.2 

Circulation

The human circulatory system:

 heart + blood vessels. 

The path taken through the body by the blood is called circulation.

Closed circulatory system: Most blood remains inside the blood vessels during transport

Circulation

-Red blood indicates blood 

  with a lot of oxygen

-Blue blood indicates blood 

  with a lot of carbondioxide

(Not really blue in real life)

2 different circulations:

Pulmonary circulation

Right side heart --> lungs --> left side heart

Systemic circulation

Left side heart --> rest of body --> right side heart

Humans have a double circulatory system: blood flows through the heart 2 times per circuit.

Left side

Right side

Pulmonary circulation

Right side of the heart pumps blood to the lungs. (Oxygen poor)

Here the blood picks up Oxygen and drops of Carbon dioxide. 

--> blood goes to left side of the heart (Oxygen rich)

Right side

Left side

Which one picks up Oxygen?

1. White blood cells
2. Red blood cells
3. Platelets

What is the pigment called that allows red blood cells to absorb Oxygen?

1. Haemoglobin
2. Thrombosis
3. Fibrinogen
4. Blood plasma

Systemic circulation

Left side of the heart pumps blood to every part of your body. (Oxygen rich)

 

Drops off: oxygen and nutrients to cells

 Picks up: Carbon dioxide and other waste products from cells

Blood goes back to right side of the heart (Oxygen poor)

 

Right side

Left side

Which one is the shortest circulation?

1. Pulmonary
2. Systemic

Homework

• chech and correct 3.1
• Make the exercises of 3.2 

The circulatory system:

1. The heart

2. Bloodvessels

The heart

- four chambers

- 2 atria

- 2 ventricles

Blood always enters the heart via an atrium

How many chambers does the heart have?

1. 2
2. 4
3. 6
4. 8

This type of muscle makes your heart pump.

1. smooth muscles
2. voluntary muscles
3. involuntary muscles
4. cardiac muscles

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...

Pictures of the heart look like this. But... how to look at it?

1. The right side on the picture is also the right side in the body
2. The right side on the picture is the left side in the body

Bloodflow

Bloodflow in the heart is a 

one-way street.

It follows the direction of the arrows

When blood flows back to the heart, where does it go first?

1. into the valves
2. into the atria
3. into the ventricles
4. into the septum

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...

one way valve

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

Which valves are located between the atria and ventricles?

1. Tricuspid valve & bicuspid valve
2. Bicuspid valve & aortic valve
3. aortic valve & pulmonary valve
4. Pulmonary valve & tricuspid valve

Pulmonary circulation

To the lungs to pick up oxygen and drop off carbondioxide

 

Systemic circulation

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

 

The heart

-left side pumps oxygen rich 

  blood into the systemic 

  circulation 

-right side pumps oxygen poor

  blood into the pulmonary 

  circulation

When is blood 'deoxygenated'?

1. When the concentration oxygen is low and the concentration carbon dioxide high
2. When the concentration of oxygen is high and the concentration of carbon dioxide high

Through which side of the heart flows oxygenated blood?

1. Right side
2. Left side

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 

Describe the pulmonary circulation and the systemic circulation

Bloodvessels

a good summary 

• headlines 
• skip lines
• lists, schematics
• keywords (use markers or underline them)
• drawings
• only facts
• short phrases or only words
• use colors or markers.
• good timemanagement 
• Efficienty and creativity