circulatory system - unit 3

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Circulatory system

unit 3

The heart pumps around 5-6 litres blood per minute through the body

1. True
2. False

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

Which valve is at the beginning of the left (big) bloodvessel?

1. Pulmonary valve
2. Bicuspid valve
3. Tricuspid valve
4. Aortic valve

highways and byways

self reading:

pg 38 t/m41

how: alone and in silence

( Marith de stiger) read for the class

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

How is it possible that blood only flows one way?
Because:

1. of the blood pressure
2. blood cells know how to flow
3. there are valves
4. how the heart contracts

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

The pathway of blood from the heart to the lungs, back to the heart is called the .... circulation.

Our blood circulation is a 'double circulatory system'. What does it mean?

Which part of the circulatory system prevents blood from flowing back?

1. Veins
2. Arteries
3. Valves
4. Atria

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

When blood goes to the heart, it flows into the ventricles first.

1. Correct
2. False

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

The systemic circulation makes sure your kidneys get oxygenated blood

1. True
2. False

Bloodvessels

Artery - capillaries - vein

Which type of bloodvessel has a thick and muscular wall?

1. Veins
2. Arteries
3. Capillaries
4. All of them

Veins contain _______ to prevent blood from flowing back

1. Openings
2. Capillaries
3. Valves

(1)____________ transports blood to the heart.
(2)____________ transports blood away from the heart

Give an explanation why arteries lay deep in the body while veins lay more on the surface

next lesson

how is blood made:

how does the body produce blood?

• the bone marrow of bones produces bloodcells (red bone marrow)
• PLATELETS, RED AND WHITE BLOOD CELLS

the components of blood

Made by: Thomas & Sem

V2TG

Chapter 3 par. 5

Red bloodcells (RBC)

- Red bloodcells transport oxygen

- RBC don't have a nucleus --> live up to 120 days

- RBC contain a protein called 'haemoglobin' 

iron deficiency = anemia (bloedarmoede)

White bloodcells

(WBC)

•  Are called 'lymphocytes' 
• WBC fight against Disease
• Can take on any shape 
• Lymphocytes produce anti-bodies

Blood clotting

• platelets (small cell fragments)
  
  
• important for clotting
  
  
• fibrinogen (soluble protein) --> fibrin (meshwork of threads)
  
  
• red blood cells get trapped