http:// the circulatory system
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OB14, OB15
Understand the structure and function of the heart, identify the four chambers of the heart, and explain the difference between the left and right ventricles
Describe the passage of blood through the heart and lungs via arteries and veins, identify the pulmonary artery and vein, aorta and vena cava, and distinguish between arteries, veins and capillaries
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There are THREE types of blood vessels ARTERIES
carry blood away from the heart
Thick, muscular, stretchy wall
narrow central tube
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VEINS carry blood towards
the heart thin walls with little
muscle wide central tube have valves
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CAPILLARIES
carry blood between arteries and veins
wall only one cell thick
very narrow central tube
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Thick muscular walls Divided into 4
chambers Right side pumps
blood to lungs Left side pumps
oxygenated blood from the lungs to ALL parts of body
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The heart is divided into
FOUR chambers
Right Ventricle
Right Atrium
Left Atrium
Left Ventricle
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The heart has four
major blood vessels
VENA CAVA PULMONARY
VEIN
AO
RT
A
PU
LM
ON
AR
YV
EIN
VENA CAVA
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Red blood cell collects OXYGEN in the lungs
2The oxygenated cell travels along the pulmonary vein to the LEFT ATRIUM
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Deoxygenated blood carried back from all parts of body
via the VENA CAVA
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Deoxygenated blood sent back to the lungs for oxygen via the PULMONARY
ARTERY
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Inside every cell oxygen is used
in RESPIRATION
to produce
WATER + CARBON DIOXIDE +
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Draw a flow chart
Show the route of a red blood cell1. Starting at lungs and moving via heart to
arm2. Leaving the arm and returning back to
the lungs3. Labelled oxygenated blood cells (red),
deoygenated blood cells (blue), the heart, lungs, arteries and veins
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