•Dissolved carbon dioxide: This is the waste gas produced by respiration in cells
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Red blood cells
contain the oxygen carrying molecule haemoglobin; this is a special pigment that gives blood its red colour. Iron is needed in the production of haemoglobin; if your diet lacks this mineral you can develop the condition anaemia.
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Platelets
Their job is to form part of a clot so that they plug a wound and stop too much blood being lost. Without that clotting mechanism you would cut your finger and bleed to death!
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Arteries
Arteries carry blood away from the heart.
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Veins
Veins carry blood back to the heart.
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Capillaries
Capillaries are tiny, thin-walled vessels. They carry blood close to all the body's cells in its tissues and organs. They may not be the most glamorous of the vessels but they are perhaps the most important.
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Other cards in this set
Card 2
Front
Red blood cells
Back
contain the oxygen carrying molecule haemoglobin; this is a special pigment that gives blood its red colour. Iron is needed in the production of haemoglobin; if your diet lacks this mineral you can develop the condition anaemia.
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