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Blood
Functions of blood
Carries oxygen and nutrients to tissues
Removes wastes substance like carbon
dioxide and urea
Transports hormones
Helps to regulate the body's temperature
and water content…read more

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Structure of blood
Plasma Red blood cells
White blood cells platelets…read more

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The parts of blood
Red blood cells
Contain the red pigment haemoglobin that
carries oxygen.
Biconcave shape increases surface area so
gas exchange is more efficient.
No nucleus so more room for haemoglobin
Plasma
A pale yellow watery fluid containing
nutrients, hormones and proteins…read more

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The parts of blood
White blood cells
Various shapes
Have a nucleus
Defend against infection
More wbc in blood when you have an infection.
Platelets
Small fragments of cells involved in blood
clotting.
Clotting is important in stopping the flow of blood
after an injury.…read more

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Problems with blood
Sickle ­ cell
anaemia
Some of the red
blood cells are
shaped like sickles,
meaning they don't
carry oxygen as
efficiently…read more

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