1. Biological Forensics

2. Blood
Artery
White blood cells
Platelets
Red blood cells

3. Blood
Plasma-55%
Buffy coat-<1%
Formed elements-45%

4. ANTIGENS

5. ANTIGENS b a b a b b a a b a b a b b a a

6. AGGLUTINATION

7. Blood being tested Serum Anti-A Anti-B Type AB (contains
agglutinogens A and B;
agglutinates with both
sera)
RBCs
Type A (contains
agglutinogen A;
agglutinates with anti-A)
Type B (contains
agglutinogen B;
agglutinates with anti-B)
Type O (contains no
agglutinogens; does not
agglutinate with either
serum)
Figure 17.16

8. Blood Typing
Serum A
Serum B
Serum
D=Rh

9. What Blood Type is this Person?

10. Blood Type & Rh
How Many Have It
Frequency O
Rh Positive
1 person in 3
37.4%
Rh Negative
1 person in 15
6.6% A
35.7%
1 person in 16
6.3% B
1 person in 12
8.5%
1 person in 67
1.5% AB
1 person in 29
3.4%
1 person in 167
.6%

11. In Class Assignment Analyze 4 suspects blood types
Compare it to blood found on the murder weapon.
Determine the murderer.

12. Normal
Polycythemia
Anemia
Sickle cell anemia

13. White Blood Cells Neutrophil 40-70% Monocyte 3-8%% Basophil <1%
Lymphocyte
20-40%
Eosinophil
2-4%

14. Identify WBC’s

15. Hematocrit Count
Capillary tube

16. Hematocrit Count
Capillary tube

17. Hematocrit Count
clay
Capillary tube

18. Hematocrit Count

20. Normal Values
Male: 40-54
Female: 37-47
Red line
100 mm
49 mm
clay