1. 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
Ask for own definition. NOTES.

2. 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)

3. Blood: function Blood is a transport medium
Task 1: What is transported by blood?

4. What is transported by blood?
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)

5. 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

6. 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

7. Blood: components (20Qs)
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?

8. 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

9. Thumbs up or down 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