BLOOD BASICS

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LO
• To be able to know the components
• To be able to know functions of blood
Plasma
• This is the yellowish liquid portion of the
blood that contains electrolytes, nutrients
and vitamins and hormones as well as red
blood cells, white blood cells and platelets.
Functions of Blood Plasma
1. Transport nutrients throughout the body
2. Maintain Blood Volume
3. Balance Electrolytes (salts) in the body
Red blood cells
Red blood cells
• Red blood cells carry oxygen from your
lungs to your heart, and then to your
muscles.
• They help to remove the carbon dioxide
from the body.
• They contain haemoglobin, which
combines with oxygen.
• They have no nucleus and a biconcave
shape to give the most space for oxygen.
Red blood cells
• They are like a
mailman.
• Why?
White blood cells
White blood cells
• They are part of the immune system
• White blood cells protect the body from
infections.
• There are several ways they can do this
– Phagocytosis:
White blood cells
• Certain types of white blood cells produce
antibodies to fight infections
• Certain WBCs called lymphocytes can
produce “memory cells” so that if the body
is infected again it can fight it quickly.
White blood cells
• They are like a policeman.
• Why?
Platelets
• These help the blood to clot if you get a
cut.
Platelets
• They are like a doctor.
• Why?
Blood
• Red blood cells –
44%
• Plasma – 55%
(90% water)
• White blood cells –
0.5%
• Platelets - 0.5%
Represent the above information using a pie
chart
Blood
cells
??? is a mixture of different types of???
suspended in a straw coloured liquid called
plasma.
????
The main function of blood is to: carry oxygen
????
and nutrients to the body’ cells; remove ????
waste
products; and protect the body against
infection.
??????
???
Different components of the blood carry out
???
different roles.
Word bank: roles, cells, plasma, infection,
blood, waste, oxygen,
Blood is made up of four different things:
Plasma – 55%
Red blood cells – 44%
Platelets – 0.05%
White blood cells – 0.05%
Represent the above information using a pie
chart
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