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Slide 1

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Blood…read more

Slide 2

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Transport In The Blood
· Human blood consists of a watery fluid called
plasma in which are two types of cell. These
are red blood cells, white blood cells and cell
fragments called platelets
· The fluid is yellow in colour and carries
carbon dioxide from the respiring tissues of
he body back to the lungs. It also carries the
soluble products of digestion from the gut to
any cells that need them…read more

Slide 3

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The fluid in the blood will carry wastes like urea
produced in the liver to the kidneys where they
are filtered and made into urine
The two blood cells have a large nucleus and
they defend the body against attacking
microbes. The platelets are small fragments of
cells, and they help to clot the blood in a wound…read more

Slide 4

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The red blood cells are more numerous than
other types of blood cells. In each cubic
millimetre of blood, there are approximately
5,000,000 of them and this will increase if the
person lives at altitude.
· The function of a red blood cell is to pick up
oxygen in the alveoli and the transport
respiring tissues.…read more

Slide 5

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Oxygen is picked up by the red pigment
called haemoglobin and reacts it to form
oxyhaemoglobin which is much brighter in
colour. When it reaches the tissues, it splits to
release the oxygen. The pigment contains the
element iron and this contributes to its colour
· A diet lacking in this element will result in a
smaller number of red blood cells being
made and the person will suffer from
anaemia. Major symptoms of this are the
person is very pale and lacks energy.…read more

Slide 6

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Red blood cells are adapted to their function
they have a biconcave disc shape which
increases their surface area to volume ratio
which results in more oxygen diffusing in.
· They have lots of red pigment haemoglobin
and they do not have a nucleus which allows
a lot more space to carry more oxygen…read more


arianator 4 life


really helpful thank you

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