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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?

Stroke volume

Cardiac output

Blood pressure

Red blood cells

Veins

Capillaries

Atria

Ventricles

Heart rate

Oxygenated

Deoxygenated

Arteries

Can you describe the

keywords?

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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:

A lower chamber is called a ventricle.

An upper chamber is called an atrium (plural: atria).

right atrium

right ventricle

left atrium

left ventricle

Cardiac muscle

Septum

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The structure of the heart

Why might the Cardiac muscle

be bigger on the left?

Vena Cava (deoxygenated

blood)

Pulmonary artery

(deoxygenated)

Aorta (oxygenated

blood)

Pulmonary vein

(oxygenated)

What is the job of the septum?

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The circulatory system – the flow of blood

body’s cells

lungs

The right side

of the heart

pumps

Deoxygenated

blood to the

lungs and then

on to the left

side of the

heart

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.

Deoxygenated

blood returns to

the right hand

side of the

heart

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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?

What factors might affect an

individual’s blood pressure?

Age.

Gender

Stress

Diet

Exercise

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Homework – key terms due in Thursday 17th May

1. What is a pulse beat?

2. State the 3 places you can measure a pulse beat. Describe

how you should measure your pulse.

3. 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.

4. Describe the difference in your pulse between rest and

exercise. Can you explain why this happened?

5. State the 4 components of blood. Describe 1 function of

each.