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Published byPatience Spencer Modified over 9 years ago
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Objective: SWBAT describe how to screen for the presence of human blood
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Bring gloves for handling blood Notebook check Thursday
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Is a way to identify and match blood samples Types: A : AA AO B : BB BO AB : AB O : OO
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Plasma : liquid part of blood contains vitamins and proteins RBC: Carries oxygen to your cells WBC: immune system Platelets: help in blood clotting
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Antigen – a protein that instigate immune reactions Antibody- proteins that will destroy harmful toxins
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Rhesus Positive or Rhesus Negative Rh + Rh – Protein in your blood similar to an antigen If you have the Rhesus protein, you are Rh + If the Rhesus protein is absent, you are Rh -
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Rh + Can receive + or - Rh - Can only receive -
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Useful Composition Blood Types Antigens and Antibodies
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Is it blood? Is it human blood? Whose blood is it?
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Kastle-Meyer Test Kastle-Meyer Water: used to pick up the stain Alcohol: increase the sensitivity of the test. by “cleaning up” the area in and around the bloodstain to better expose the hemoglobin. Phenolphthalein: This is a solution which acts as a color indicator. When this solution is oxidized (exposed to oxygen), it will turn pink. Hydrogen Peroxide: water with an extra oxygen atom attached to it.
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1. What type of test is used to determine if blood is present? A. Presumptive B. Confirmatory C. blood type test 2. What is a Kastle-Meyer test? 3. What are the 4 components of blood?
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