Objective: SWBAT describe how to screen for the presence of human blood

 Bring gloves for handling blood  Notebook check Thursday

 Is a way to identify and match blood samples Types: A : AA AO B : BB BO AB : AB O : OO

 Plasma : liquid part of blood contains vitamins and proteins  RBC: Carries oxygen to your cells  WBC: immune system  Platelets: help in blood clotting

 Antigen – a protein that instigate immune reactions  Antibody- proteins that will destroy harmful toxins

 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 -

Rh +  Can receive + or - Rh -  Can only receive -

 Useful  Composition  Blood Types  Antigens and Antibodies

 Is it blood?  Is it human blood?  Whose blood is it?

 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.

 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?