Download - The Components
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The components of the blood
and their jobs
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What is blood made up of?
• Red blood cells
• White blood cells
•Platelets• Plasma
• Breakdown products of digestion, such as glucose,fatty acids and amino acids
• Dissoled mineral salts
• !arbon dio"ide
• #rea
• hormones
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What is plasma?
• Plasma is the li$uid part of the blood
which carries eerything else%
• Plasma is a straw&yellow coloured li$uid
• 'f eerything in plasma was remoed,
plasma would look like this
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What do the different parts of blood
look like under a microscope?
Red
bloodcells
White
blood
cells
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What is the job of red blood cells?
• They hae a round, flat discshape for a large surface area
• They do not hae a nucleus
• They contain haemoglobinwhich combines with o"ygen inareas of high concentration toform o"yhaemoglobin
• ("ygen ) haemoglobin o"yhaemoglobin
• Red blood cells carry o"ygento the cells of the body for usein respiration
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What do white blood cells do?
• White blood cells
help the body to fight
inading bacteria
• White blood cells will
engulf and ingest
inading bacteria
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(ther important jobs of the white
blood cells*
• They produce
antibodies which can
recognise and fight
bacteria
• They produce
antito"ins which
neutralise the to"ins
+poisons that
bacteria produce,which make us feel ill
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What do platelets do?
• Platelets are fragments of cells
• The job of platelets is to help blood clot and
form a scab• The platelets are involved in the formation
of fibrin, which is needed for clotting blood
• This is useful for stopping bleeding, and for preventing germs from entering the bodythrough the cut
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-ummary of the composition of blood
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.uestions on the blood
• What part of blood carries o"ygen to cells?
• Why are red blood cells flat disc&shaped?
• What is the job of platelets?
• What do white blood cells do?
• Describe how a white blood cell carries out its
job%• What is the straw&coloured li$uid which carries
all the other parts of blood called?
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/ore $uestions on blood
• Name cell A
• Name cell B B
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