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Unit 3c


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Unit 3c

  1. 1. Unit 3(c): The circulatory system.
  2. 2. Unit 3(c): The circulatory system. Index. 1. New words 2. The circulatory system . 3. Parts of the circulatory system. 4. Healthy habits. 5. Experiment 6. Activities.
  3. 3. Unit 3(b): Human body. 1. New words. •Blood vessels•Arteries•Veins•Chambers•Capillaries•the pulses•Blood pressure•Heart beat rate•Restrug•Disorder•Hollow•Fist•Atrium•Ventricle- Vasos sanguíneos arterias venas compartimentos capilares pulsaciones tensión arterial tasa de pulsaciones descansando alteraciones, enfermedades hueco puño aurícula ventrículo
  4. 4. Unit 3(b): Human body. 2-º The Circuylatory system. The circulatory system. CIRCULATION consists of transporting nutrients, oxygen and residues around the body
  5. 5. Unit 3(b): Human body. 3. The Circulatory system. The circulatory System consists of: •Blood vessels •Blood •Heart
  6. 6. Unit 3(b): Human body. 1. The Circuylatory system.
  7. 7. BLOOD VESSELS • Blood vessels are the conducts through which the blood circulates, pushed by the heart.
  8. 8. THERE ARE THREE TYPES • VEINS: they transport the blood from the organs to the heart. • ARTERIES: they transport the blood from the heart to the organs. • CAPILLARIES: They are very small vessels that connect the veins and arteries and reach all the cells in our body.
  9. 9. THERE ARE THREE TYPES • VEINS are thinner than arteries • ARTERIES are the thickest • CAPILLARIES are the thinnest
  10. 10. • Veins are blue because they are carrying the darker blood without oxygen back to heart.
  11. 11. • Arteries have oxygenated blood that is bright red colour.
  12. 12. Gas Exchange Occurs, The oxygen and CO2 are exchanged…in the cells Oxygen Rich Tissue Oxygen Poor Oxygen Rich Oxygen Poor Now lets go back to the heart!!!
  13. 13. The Human Heart The first person to describe circulation as we know it today was Dr. William Harvey
  14. 14. THE HEART The heart is a hollow organ made of muscle.
  15. 15. The heart is placed in the chest, a little to the left side. In the adult it weighs 300 grs and it is about the size of a fist.
  16. 16. It is divided into two unconnected parts the right and left. Each part is also divided into two: • The upper part is THE ATRIUM • The lower part is THE VENTRICLE • The atrium and the ventricle are connected by a valve.
  17. 17. The blood. In an adult s body there are about five litres of blood.
  18. 18. Blood is a thick, red liquid composed of: BLOOD COMPOSITION
  19. 19. Plasma Platelets White blood cells Red blood cells Whole Blood Sample Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
  20. 20. Plasma is water with PLASMA different substances dissolved in it. It transports the nutrients and the residues.
  21. 21. BLOOD CELLS There are three types: RED BLOOD CELLS: give blood its colour and transport oxygen and carbon dioxide.
  22. 22. WHITE BLOOD CELLS: protect us and defend us from infections.
  23. 23. PLATELETS: block our wounds so we do not lose too much blood. Break in Capillary Clumping of Wall Platelets Clot Forms
  24. 24. THE FUNCTIONS OF THE BLOOD *Blood transports nutrients and oxygen to the cells and take away the residues to where they are eliminated. *It also defends our body from infections.
  25. 25. Your Heart: The Vital Pump • At REST, the heart pumps at 70 beats a minute. It is usually faster in children. • During exercise it may increase to double the resting rate. • Also emotions and illnesses may cause the heart to beat faster.
  26. 26. What are the pulses? In certain places, at the wrists, in the neck on the temples, arteries are near the surface and cen be felt easily. Doctors take the pulses to know the regularity of the heart.
  27. 27. What is blood pressure? It is the pressure of blood in the arteries which can be too high or to low in some diseases. A normal blood pressure is 120/80
  28. 28. Blood Types Massive loss of blood requires a transfusion Four Types A B AB O Inherited from your parents
  29. 29. Blood Types
  30. 30. What Makes Our Blood Type?
  31. 31. Blood Transfusions Blood Type of Donor Blood Type of Recipient A B AB O A B AB O Unsuccessful transfusion Successful transfusion
  32. 32. LUNGS
  33. 33. The CirculatorySystem. Healthy habits
  34. 34. Current PREVENTION Recommendations Regular exercise
  35. 35. Weight control
  36. 36. Well balanced diet
  37. 37. Do not eat too much junk food It contains cholesterol, a fat that collects in our blood vessels and blocks them.
  38. 38. Do not smoke
  39. 39. Summary Healthy Habits • • • • • Regular exercise Weight control Well balanced diet Do not eat too much junk food Do not smoke