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Slide 2

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The 3 main components of the circulatory system are:
- The Heart
- Blood Vessels
- Blood
Blood is made up of 4 main components:
- Plasma
Yellow substance that carries everything and transports
- Platelets
Broken cells which clot blood
- Red Blood Cells
Carry Haemoglobin and oxygen
- White Blood cells
Fight infection and disease…read more

Slide 3

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Pulmonary Circuit
Pulmonary arteries carry deoxygenated blood from the heart to
the lungs which then sends oxygenated blood along the
pulmonary veins back to the heart.
Systematic Circuit
Systematic veins send oxygenated blood around the whole body.
When the oxygen has been used by body cells, deoxygenated
blood is sent back to the heart along the systematic arteries.
m atic
s y ste ole VeINs =
r t hat y ­ wh INto he
art = Ox
e mb le bod Artery =
Away fr
Rem e who om hea
rt = Deo
is th m. xygena
sys…read more

Slide 4

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How are Arteries, Veins and Capillaries different?
Arteries Veins Capillaries
Have thick walls and Have thin walls and Have very thin walls ­
thick muscle. thick muscle one cell thick
Works under high Works under low Semi-permeable so
pressure pressure substances can pass
Narrow lumen Wide lumen Feed body with
oxygen and nutrients
No valves, has a pulse Have valves to Waste products are
prevent backflow removed…read more


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