Thursday 27 October Topic: Blood!!! - PowerPoint PPT Presentation

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Thursday 27 October Topic: Blood!!!

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  1. Thursday 27 October Topic: Blood!!! DO NOW: What do you already know about blood? Think about:Where is it in the body? Which types of organisms have it? What purpose does it serve? What does it contain? What problems/disorders can be associated with it?

  2. Objective • By the end of this period, you will be able to identify the components of blood that can be used for post-mortem analysis. Agenda • Notes about blood • Vocabulary HW • Create a concept map from the class notes

  3. What is BLOOD? • A bodily fluid (1 of 6) • Carries various substances • Regulates body temperature • Found in every “true” animal OBJECTIVE: By the end of this period, you will be able to identify the components of blood that can be used for post-mortem analysis.

  4. What does blood contain? • PLASMA: straw colored liquid component of blood • CELLS: RBCs (erythrocytes), WBCs (leukocytes), platelets (thrombocytes) • MOLECULES: proteins, hormones, gases, nutrients, ions OBJECTIVE: By the end of this period, you will be able to identify the components of blood that can be used for post-mortem analysis.

  5. What can be analyzed? • CELLS: A cell count can be an indication of general health • WBC count = indicates presence of types of illness (lots = disease, almost none = HIV/AIDS) • RBC count = low number indicates anemia • Platelet count = various clotting disorders

  6. What can be analyzed? • MOLECULES: • Gases = respiratory issues around time of death (e.g. choking, carbon monoxide poisoning) • Nutrients = diabetes, general time of last meal • Proteins = many different types for many functions in the body. THE KEY ONES: • ALBUMIN – regulates blood pressure • METABOLITES – byproducts of the body breaking down substances (such as medicines, drugs, alcohol, poison) • ANTIBODIES – immune functions, can give info about where the person has been throughout life

  7. Post-Mortem Analysis • What is it? • Aka AUTOPSY • Highly surgical procedure used to determine cause of death (suspicious or natural) • Why is it important? • 3 categories: forensic, clinical, academic • Used to place cause of death into 1 of 5 categories • Natural • Accident • Homicide • Suicide • Unknown

  8. Friday 28 October Topic: Testing for presence of blood DO NOW: What are the 3 main components of blood? What can you test for each of the types of cells found in blood? What molecules are important to test for in blood? Which one is most important to a forensics analyst and why? What is post-mortem analysis? What types are there and what is the difference?

  9. Objective • By the end of this period, you will be able to explain how a Kastle-Meyer test is performed and describe the possible outcomes. Agenda • Stations about testing for the presence of blood! • Distribute assessments and progress reports HW • None

  10. STATIONS! • There are 3 stations • At each, you are to: • Actively read the provided material • List any key vocabulary or facts • Summarize the information • Explain why this is important to know before doing the lab on Monday to test for the presence of blood