Circulatory Circulatory SystemSystem

CirculationCirculation

Heart structureHeart structure

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Function:To transport materials

around the body

Oxygen

Carbon dioxide

Digested food

Hormones

Waste chemicals - urea

Heat

Double CirculationDouble Circulation

Left side

Oxygenated blood from the lungs enters the heart and is pumped to the body organs and tissues

Right side

Deoxygenated blood from the body is returned to the heart to be pumped to the lungs

Systemic – to the organs of the body

Pulmonary system – up to the lungs

OXYGENCARBON DIOXIDE

Structure of the heartStructure of the heart

You need to be able to label all parts of the heart

LEFT SIDERIGHT SIDE

Left ventricle – has a thicker muscle wall than right side – why?

Right ventricle

valve

right atrium ?

Blood from lungsBlood from ?

Body organs

LEFT SIDERIGHT SIDE

Left ventricleRight ventricle

valve

right atrium Left atrium

Blood from lungsBlood from ?

Blood to the ?Blood to the ?

Beating heart – Beating heart – blood flowblood flow

The valves prevent the backflow of blood.

How do the valves work?

How many can you see?

Atrium and ventricle muscles force the blood through and out of the heart

out

in in

Can you see the 4 valves?

VALVE between the atrium and ventricle

Ventricle wall

Ventricle chamber

The endThe end