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Circulatory system blood


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Circulatory system blood

  1. 1. Circulatory System: Blood!<br />7SCIENCE Mon. Jan. 17<br />
  2. 2. What is blood?<br />Blood makes up around 8% of your body weight (5L!)<br />Consists of:<br />Cells and liquid<br />Blood has many parts:<br />Plasma<br />Liquid part of blood, mostly water<br />Red blood cells<br />Has hemoglobin, important for carrying oxygen and carbon dioxide<br />White blood cells<br />Fight bacteria and other foreign substances <br />Platelets<br />Pieces of cells that help form blood clots (stop bleeding)<br />
  3. 3. Why is it important to study?<br />Has many functions:<br />Carries oxygen from your lungs to the rest of the body<br />Removes carbon dioxide from body cells and carries it to your lungs to beremoved<br />Carries wastes from your kidneys<br />Transports nutrients<br />Fights infections<br />
  4. 4. Blood Types<br />Sometimes you may need to receive blood<br />E.g. surgery, accident<br />This is called a blood transfusion<br />Must be the right type!<br />If it is the WRONG type, the blood cells will clump together and clog the blood vessel<br />4 Blood Types: A,B, AB and O<br />
  5. 5. Diseases of the blood<br />Anemia<br />Too few red blood cells ortoo little hemoglobin to carry oxygen <br />Cells cannot get enough oxygen<br />Leukemia<br />Too many white blood cells areproduced but they cannot fight infections <br />Treatments: Blood transfusions, bone marrow transplants, chemotherapy and radiation may be used<br />Why is blood called the ‘tissue of life’?<br />