Download The Circulatory system

THE CIRCULATORY SYSTEM
All – will know the key structures and basic
actions of the heart
Most – will be able to describe the actions and
structures of the heart using the correct
terminology
Some – will be able describe some of the
advanced structures of the circulatory system
and their functions
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The Circulatory System
• Research work-Use full sentences P12 and P14
1.Name 3 main parts of the circulatory system
2.How many chambers does the heart have and
what are they called?
3.Give a definition for the pulse.
4.Identify 3 places where you can take the pulse.
5.Name the 4 components of blood and give a
brief description of each.
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Discussion – What keywords do you think
are linked to this system?
Veins
Capillaries
Atria
Ventricles
Heart rate
Oxygenated
Deoxygenated
Arteries
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Stroke volume
Cardiac output
Blood pressure
Red blood cells
Can you describe the
keywords?
Structure of the heart
What is the heart?
The heart is a pump
made of cardiac
muscle
Each time a blood cell
travels around the
body it passes through
the heart twice.
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The structure of the heart
The heart has 4 chambers:
An upper chamber is called an atrium (plural: atria).
right
atrium
right
ventricle
Septum
left
atrium
left
ventricle
Cardiac
muscle
A lower chamber is called a ventricle.
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The structure of the heart
Pulmonary
artery
(deoxygenated)
Aorta
(oxygenated
blood)
Pulmonary
vein
(oxygenated)
Vena Cava
(deoxygenated
blood)
What is the job
of the septum?
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Why
might the
Cardiac
muscle
be bigger
on the
left?
The circulatory system – the flow of blood
The right side
of the heart
pumps
Deoxygenated
blood to the
lungs and then
on to the left
side of the
heart
Deoxygenated
blood returns to
the right hand
side of the
heart
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lungs
body’s
cells
Oxygenated
blood from
the lungs
returns to the
left side of
the heart
Oxygenated
blood is pumped
by the left side
of the heart to
the body e.g.
legs and back to
the right side of
the heart.
The circulatory system
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Task
 Label the key words below on your worksheet.
Extension
Can you label the septum, cardiac muscle, valves and key
blood vessels
 Complete Q2 on your worksheet by filling in the arrows.
Also use the keywords below .
 Lungs, Body (muscles and organs), Oxygen and Carbon
dioxide
Extension
Can you label the key blood vessels (aorta, pulmonary vein,
pulmonary artery and vena cava) and 2 pathways.
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The heart as a pump
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Video – How does blood flow around
the body?
• Watch the video on the circulatory system
• Note down any key words linked to blood
vessels.
http://www.bbc.co.uk/schools/gcsebitesize/pe/
appliedanatomy/circulatory/0_anatomy_circu
latorysys_act.shtml
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Task
Complete task 3 and 4 on your worksheet. Use
your knowledge, textbook and key words for
support.
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What is Blood pressure?
Blood pressure – how hard the heart is
working to push blood through the
vessels.
Normal blood pressure is 120/80 at rest.
What do you think happens to blood
pressure during exercise?
Age.
Gender
Stress
What factors might affect an
individual’s blood pressure?
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Diet
Exercise
Homework – key terms due in Thursday 17th May
1.
2.
3.
4.
5.
What is a pulse beat?
State the 3 places you can measure a pulse beat. Describe
how you should measure your pulse.
Count your pulse at rest for 1 minute and record the number
of beats. Exercise for 1 minute. Take your pulse again for 1
minute and record the number of beats.
Describe the difference in your pulse between rest and
exercise. Can you explain why this happened?
State the 4 components of blood. Describe 1 function of
each.
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