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Understanding Blood: Components, Functions, and Donation

Explore the components of blood, its functions, and the importance of blood donation for human health. Learn how changes in blood affect wellbeing. Interactive activities included.

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Understanding Blood: Components, Functions, and Donation

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  1. Teachers’ notes N.B. Teachers’ notes and background information can only be viewedif this presentation is opened within the PowerPoint application,not on interactive whiteboards. The visuals on the PowerPoint slides display best in PowerPoint presentation mode.

  2. ‘Giving to help others’

  3. 1. All blood is red 5. A person’s blood vessels, arranged end-to-end, would stretch the length of the playground – and beyond! 2. Blood contains metal 3. Blood is made in the heart 4. The average body contains roughly 9 pints (4.5 litres) of blood True True True False False Myth busters! Do you know which of these statements are true and which are false?

  4. Explain how changes in a person’s blood can impact their health and wellbeing and how blood donation can help Identify the main components of blood and their different functions Describe the composition of blood using percentages Learning aim Can I describe the different components of blood and explain their impact on human health? Success criteria:

  5. What can you see?

  6. What’s blood made of? White blood cells Plasma Platelets Red blood cells

  7. “I deliver oxygen around your body and take away waste” Red blood cells

  8. “I hunt down germs and protect you from disease” White blood cells 13

  9. “I carry out repairs by clotting your blood” Platelets 14 14

  10. “…and I provide the transport” Plasma

  11. How does blood travel?

  12. Finding your pulse

  13. Plasma Platelets White blood cells Red blood cells Can you calculate the quantities? What you know: White blood cells andplatelets make up 2% of a person’s blood. The ratio of white blood cells and platelets to red blood cells is 1:22. 1.5% of a person’s blood is made up of white blood cells. 54% 44% 1.5% 0.5%

  14. Plasma Platelets White blood cells Red blood Cells Can you calculate the quantities? What you know: A person’s blood contains three times more white blood cells than platelets. The ratio of white blood cells and platelets to red blood cells is 1:22. White blood cells and platelets make up 2% of a person’s blood. 54% 44% 1.5% 0.5%

  15. Plasma Platelets White blood cells Red blood cells Your recipeUse the recipe to make an accurate representation of blood.Think carefully about how much of each ingredient you will need. 54% 44% 1.5% 0.5%

  16. What happens if your blood doesn’t have the right ingredients?

  17. Why do people give blood?

  18. Who could you help? AB− AB+ O+ O− B+ A+ A− B−

  19. ‘Giving to help others’ See extension activities

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