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  1. 1. Blood vessels Arteries, capillaries and veins
  2. 2. Keywords <ul><li>Plasma </li></ul><ul><li>Platelets </li></ul><ul><li>Capillaries </li></ul><ul><li>Arteries </li></ul><ul><li>Veins </li></ul><ul><li>Oxygenated </li></ul><ul><li>Deoxygenated </li></ul><ul><li>Circulatory </li></ul><ul><li>valves </li></ul>You need to write these down
  3. 3. Blood vessels Deoxygenated blood Oxygenated blood Low pressure/Thin walls/ large hole/ valves High pressure/Thick muscular walls/ small hole/ no valves One cell thick Where gas exchange occurs with cells Away from heart To the heart You need to draw these You need to write down a table of differences
  4. 4. Valve <ul><li>Needed in veins to stop backflow </li></ul><ul><li>Due to low pressure in veins </li></ul>varicose
  5. 5. Question 4a) Which diagram shows a slice across an artery, X or Y? b) Write down one difference between the wall of an artery and the wall of a vein. c) Write down one difference between the blood in most arteries and the blood in most veins. d) What would you find in a leg vein which is not shown in the diagram?
  6. 6. Circulatory system You need to draw this diagram
  7. 7. Blood cells Carry oxygen Contain the red pigment haemoglobin Blood clotting Fighting infection You need to draw these
  8. 8. 1 is about 44% of the blood 6 is a flowing liquid 3 are disc shaped 9 help to seal cuts 5 are fragments of cells 7 can change shape 4 contains haemoglobin 8 carries oxygen 2 contains dissolved nutrients 10 help to protect you from disease Statements Appearance Platelets White blood cells Red blood cells Plasma
  9. 9. Taking your blood pressure <ul><li>Your doctor may take this if you are unwell or have a check up </li></ul><ul><li>Can you test your blood pressure with the machine? </li></ul>
  10. 10. Giving Blood <ul><li>You can give blood from the age of 17 </li></ul><ul><li>You could save a life </li></ul><ul><li>It is painless </li></ul><ul><li>There are some restrictions on the people who can give blood </li></ul><ul><li>You can give blood every 16 weeks </li></ul><ul><li>Red blood cells last 35 days, platelets just 5 days </li></ul><ul><li>The demand for blood is increasing </li></ul>
  11. 11. Can you give blood if you? <ul><li>Are anaemic? </li></ul><ul><li>Have a cold at the moment? </li></ul><ul><li>Have ever had malaria? </li></ul><ul><li>Weigh less than 7 stone 12 lbs? </li></ul><ul><li>Are under 17? </li></ul><ul><li>Are over 70? </li></ul><ul><li>Have ever been paid for sex? </li></ul><ul><li>Have paid for sex in the last year ? </li></ul><ul><li>Have ever injected drugs? </li></ul><ul><li>Have had a piercing in the last 3 months? </li></ul><ul><li>Have had a tattoo in the last 3 months? </li></ul><ul><li>Have had acupuncture in the last 3 months? </li></ul><ul><li>Have had a vaccination in the last 2 months? </li></ul><ul><li>Have received blood since 1 st January 1980? </li></ul>The answer to all of these is NO ! There are also lots of other rules
  12. 12. What are the blood groups? <ul><li>0+ 37% of the population </li></ul><ul><li>A+ 35% </li></ul><ul><li>B+ 8% </li></ul><ul><li>0- 7% </li></ul><ul><li>A- 7% </li></ul><ul><li>AB+ 3% </li></ul><ul><li>B- 2% </li></ul><ul><li>AB- 1% </li></ul>
  13. 13. What is the blood used for? <ul><li>Cancer, rare diseases and sickle cell treatment – 53% </li></ul><ul><li>Transplant and orthopaedic surgery – 36 % </li></ul><ul><li>Babies/pregnant mothers – 6 % </li></ul><ul><li>Accident victims – 5 % </li></ul>
  14. 14. What is the blood used for-2? <ul><li>Red cells – to treat anaemia and sickle cell </li></ul><ul><li>Platelets – leukemia, haemophilia </li></ul><ul><li>Plasma - childbirth, heart surgery </li></ul>
  15. 15. Homework <ul><li>Can you design a leaflet to encourage 17 year olds to give blood </li></ul><ul><li>Inform them why they should give blood </li></ul><ul><li>And who can and who cannot give blood </li></ul>