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Blood and lymphatic system - PowerPoint PPT Presentation

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Blood and lymphatic system
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  1. Blood and lymphatic system

  2. Do now • Review 33.2 Worksheet

  3. Homework due today • Lab Questions • Chapter 33.2 Worksheet

  4. Homework Due tomorrow • Answer questions 1-3 on page 961

  5. Plasma • 90% water • 10% dissolved gases, salts, nutrients, enzymes, hormones, etc. • Helps control body temperature • Albumin, globulins, and fibrinogen

  6. Red blood cells • Most numerous cells in blood • Transport oxygen • Get their color from iron in hemoglobin • Binds oxygen in the lungs • Produced by cells in red bone marrow • Circulate for average of 120 days

  7. White blood cells • Also called, leukocytes • Guard against infection • Increased levels signify a fight against serious infection • Outnumbered by RBCs 1000 to 1 • Can live for years

  8. platelets • Plasma proteins and cell fragments

  9. What is this?

  10. Leeches • Until mid 19th century, patients were bled by the use of leeches • In 2004, the FDA approved the use of leeches as a medical device • Must be limited to when blood needs to be taken from a specific area of tissue • Such as when blood needs to be drained from an area surrounded by damaged blood vessels • Leeches take blood but also release a chemical that inhibit clotting, increasing blood flow • Also numb the area while blood is drawn

  11. Blood Transfusions • First carried out in 1818 • Work when blood types match • Can happen when blood types don’t match

  12. Homework Due tomorrow • Answer questions 1-3 on page 961