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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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