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Separating blood
Blood is separated in to 4 different parts: plasma, red blood
cells, white blood cells and platelets. Each part of the blood is
used to treat different diseases.
Blood clots do not form in donations because red and white
blood cells are heavier than plasma and platelets (blood clots)
so they are forced to the outside edge of the containers in the
centrifuge.
The technique to separate different types of blood is called
filtration.
The technique to separate white blood cells from red blood
cells is a centrifuge, which involves spinning.
Blood is separated in a centrifuge rather than settling by itself
because the heavier parts of the mixture wouldn’t be pushed
too the edge.
Plasma and platelets do not move to the outside of the
centrifuge this suggest that elements are lighter than the other
elements in the mixture.
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8. a. To donate blood you need to be 16 years or older.
b. You have to be around 45kilograms or over to donate blood.
c. You can’t donate blood when you have just recently have a
tattoo because your blood could be infected from a dieses from
a needle.