Download Blood - AIS IGCSE Science

Blood
Learning objectives:
• Describe the composition of the blood
• Explain how adaptations of red blood cells make them
suitable for their function
• Understand the role of plasma
RECAP
The main function of the
circulatory system is transport.
It is particularly important for
the delivery of reactants of
respiration, and disposing of
the waste products of
respiration
The circulatory system consists
of:
Heart (pump)
Blood vessels (arteries, veins
and capillaries extend
throughout the body)
Blood (transport medium)
Blood: function
• Blood is a transport medium
Task 1: What is transported by blood?
What is transported by blood?
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•
•
•
•
•
Nutrients (e.g. glucose, amino acids)
Antibodies (protein molecules involved in immunity)
Carbon dioxide (waste product of aerobic respiration)
Hormones (transported from gland to target cells)
Oxygen (reactant for aerobic respiration)
Urea (nitrogenous waste filtered out of the blood by
kidneys)
• Heat (skin arterioles can change diameter in order to
gain or lose heat)
Blood: components
• Plasma – liquid portion of the
blood
• Erythrocytes – (red blood cells)
– carry oxygen (and some
carbon dioxide)
• Leucocytes – (white blood
cells) – protect the body against
infection – phagocytes and
lymphocytes
• Platelets – cell fragments assist
in clotting
plasma
Blood: components
Task 2
In your groups, you will be
assigned a blood component
You must…
• Prepare a 2 minute presentation
to inform your classmates about
your component
Plasma
Red blood cell
Lymphocyte (white blood cell)
Phagocyte (white blood cell)
Platelets
plasma
Blood: components (20Qs)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
Which has a nucleus?
Which is the liquid part of the blood?
Which carries nutrients such as glucose?
Which carries oxygen?
Which cell does not have a nucleus?
Which contains haemoglobin?
Which is not a proper cell, just a fragment?
Which digests microbes?
Which makes antibodies?
Which has a biconcave disc shape?
Which increases in number if we get an infection?
Which carries hormones?
Which is shaped to have a large surface area?
Which carries carbon dioxide?
Which helps the blood to clot and make a scab?
Which is a straw coloured liquid?
Which is mis-shaped in sickle cell anaemia?
Which has two types?
Also known as red blood cells?
Also known as white blood cells?
Blood: components (20Qs)
1. Which has a nucleus? leucocytes
2. Which is the liquid part of the blood? Plasma
3. Which carries nutrients such as glucose? Plasma
4. Which carries oxygen? erythrocytes
5. Which cell does not have a nucleus? erythrocytes
6. Which contains haemoglobin? erythrocytes
7. Which is not a proper cell, just a fragment? Platelet
8. Which digests microbes? phagocytes
9. Which makes antibodies? lymphocytes
10. Which has a biconcave disc shape? erythrocytes
11. Which increases in number if we get an infection? lymphocytes
12. Which carries hormones? Plasma
13. Which is shaped to have a large surface area? erythrocytes
14. Which carries carbon dioxide? Plasma
15. Which helps the blood to clot and make a scab? Platelets
16. Which is a straw coloured liquid? Plasma
17. Which is mis-shaped in sickle cell anaemia? erythrocytes
18. Which has two types? Leucocytes
19. Also known as red blood cells? Erythrocytes
20. Also known as white blood cells? leucocytes
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Learning objectives:
• Describe the composition of the blood
• Explain how adaptations of red blood cells make
them suitable for their function
• Understand the role of plasma