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Blood%20and%20Blood%20Spatter

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Forensic Serology Objective: To learn the roles of antibodies and antigens in the compatibility of blood typing http://science.howstuffworks.com/bloodstain-pattern ... – PowerPoint PPT presentation

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Title: Blood%20and%20Blood%20Spatter


1
Blood and Blood Spatter
2
Brainpop
  • Hemoglobin
  • Blood Plasma
  • White Blood Cells
  • How many pints of blood does an adult human have?

3
Components of Blood
Red Blood Cells
  1. _____________
  2. _____________
  3. _____________
  4. _____________

White Blood Cells
Plasma
Platelets
4
Red Blood Cell (Erythrocytes)
oxygen
  • Carry ________ to cells
  • O2 binds to ___________

hemoglobin
5
White Blood Cells (AKA Leukocytes)
protect
  • Help _________ the body against _____________
  • __________ are a type of WBC

foreign cells
Antibodies
6
Table Talk
  1. Give an example of a white blood cell
  2. Contrast WBCs and RBCs

7
Brainpop Blood Typing
  1. What are the two components to your blood type?
  2. What is hemolysis?
  3. What is the Rh factor?
  4. What is the most common blood type in Americans?
  5. What is the least common blood type in Americans?

8
Plasma and Platelets
  • Plasma
  • Transports __________
  • Platelets
  • Help form ___________

substances
blood clots
9
ABO Blood Groups
  • The four blood groups
  • A
  • B
  • AB
  • O

10
Determining Blood Type
  • Antigens
  • Found on _____________ of RBC
  • Type of antigen on RBC ____________ blood type
  • Ex

surface
determines
11
Continued
  • Antibodies
  • Destroy __________
  • Non-matching _________ found in ___________
  • E.x.

foreign cells
antibody
plasma
12
Rh Factor
  • Makes blood type either or
  • Rh
  • Rh antigen ________
  • Rh-
  • ____ Rh antigen

present
No
13
Blood Typing
14
Agglutination
  • Occurs when matching __________ and antigens
    _______
  • Results in ____________ of blood

antibodies
bind
clumping
15
ABO Blood Types Chart
Blood Type Antigen on RBC Antibody in Plasma
A
B
AB
O
16
When does the Rh factor effect blood
compatibility?
  • When a ________ type mixes with a _________
  • Most common in _________
  • Why is this dangerous?

17
Blood Typing Game
  • http//nobelprize.org/educational/medicine/landste
    iner/

18
Blood Typing Challenge!
Patient Blood Type Type(s) of Blood Transfused
1    
2    
3    
19
Analysis
  • A) Draw and label a B positive red blood cell.
    Draw the antibodies that would be found in the
    plasma.
  • B) Draw and label an A negative red
  • blood cell. Draw the antibodies
  • that would be found in the plasma.
  • Can a person with A negative blood donate blood
    to a person with A positive blood? Why or why
    not?

20
Continued
  1. Can a person with B positive blood donate blood
    to a person with B negative blood? Why or why
    not?
  2. Explain why a person with A negative blood cant
    receive blood from a person with B negative
    blood. The answer is not because they are not
    the same blood type.
  3. What would happen to a person if they were given
    the incorrect blood type during a transfusion?

21
Crime Scene Analysis
22
Blood Spatter Analysis
  • http//www.sciencechannel.com/tv-shows/science-cha
    nnel-presents/videos/discoveries-this-week-blood-s
    platter.htm

23
Forensic Serology
  • The study of _____________
  • E.x
  • Blood
  • Semen
  • Fecal matter

body fluids
24
Blood Spatter Patterns
  • The pattern ________ makes when it lands on
    ___________
  • Types of Spatter
  • Passive
  • Due to ___________

blood
a surface
gravity
25
Continued
  • Transfer
  • Bloody objects __________ a surface
  • Impact
  • Blood ________ through air

touch
projected
26
Analyzing Blood Spatter
27
Analyzing Blood Spatter
  • Spines
  • Point in the ___________ of travel
  • Parent Drop
  • ______ from which satellite spatter ___________
  • Satellite Spatters
  • Drops that _________ from parent drop

direction
Drops
originate
break away
28
Surface Texture
  • Porous surfaces ______ spatter
  • Ex.
  • Cloth
  • carpet

less
29
Impact Angle Analysis
  • The angle formed between ___________ and
    __________
  • Velocity of spatter
  • High
  • Diameter _____________
  • Medium
  • Diameter _____________
  • Low
  • Diameter _______________

blood
a surface
less than 1 mm
between 1-4 mm
greater than 4 mm
30
Table Talk
31
Table Talk
32
Area/Point of Convergence
  • Determined by drawing a _______ through the long
    axis of a group of ____________
  • Where the ______ of the group _________ point
    of convergence

line
bloodstains
lines
intersect
33
At the Crime Scene
  • Investigator must ask
  • _______________
  • _______________
  • _______________

Human or animal blood
Victim or suspect
Type of weapon
34
Luminol
  • Chemical used to _________ blood
  • Works by
  • Binds to ______ in blood
  • Shines under ____________

develop
iron
Black-light
35
A Dingo Ate My Baby!!!
  • Camping Trip August 1980
  • Claimed a dingo took her daughter
  • What type of evidence would you look for?

Lindy Chamberlain
https//www.youtube.com/watch?vVKxiqa6kdrI
36
Analyzing Impact Angle
37
Analyzing Impact Angle
  • As the angle of impact _________ the spatter
    elongates
  • fewer degrees on the protractor

increases
38
Table Talk
Which set of results is correct?
39
No Movement
40
Walking Fast vs Walking Slow
41
(No Transcript)
42
The effect of movement on spatter
  • Speed
  • As speed increases spatters are ____________
  • Direction
  • Spines ________ the direction of travel

closer together
point in
43
Table Talk
44
(No Transcript)
45
A little Heart Trivia
  • How big is your heart?
  • T or F Your heart grows as you grow
  • T of F Both birds and humans have a 4 chambered
    heart
  • T or F Age affects your heart rate
  • T or F your hear rate drops while youre
    sleeping

46
The Circulatory System (AKA The Cardiovascular
System)
  • Made up of
  • 1._____________
  • 2._____________
  • 3._____________
  • Function
  • _________ materials
  • Removes ________
  • Regulates ______________

Heart
Blood
Blood vessels
Transports
waste
body temp
47
General Structure of the Heart
  • 4 Chambers
  • Two ______ (upper)
  • Two ventricles (lower)
  • 4 _________
  • 2 major arteries and 3 major veins

atria
valves
48
Pericardium
  • Filled with pericardial fluid (protection)
  • ________________

Shock absorption
49
Heart Valves
  • Flaps of tissue that _______ a back flow of
    blood.
  • Only open in ______________

prevent
one direction
50
Blood vessels https//www.youtube.com/watch?vq0s-
1MC1hcE
  • Arteries
  • Carry blood ______ from the heart
  • Veins
  • Bring blood ________ to the heart

away
back
51
The Aorta
52
Table Talk
  • Predict what would happen if a valve did not work
    properly.
  • Who would have a lower resting heart rate an
    athlete or a couch potato? Why?

53
Capillaries
  • Thin walls allow for ___________ in organs and
    tissues

gas exchange
54
Brainpop Video
  • Heartbeat
  • Valve
  • Is the heart a muscle?
  • Which type of tissue is found in the heart?
  • Heart Diagram

55
Blood Flow
  • https//www.youtube.com/watch?vKSbbDnbSEyM

56
Heart Valves
Bicuspid (Mitral) valve
Tricuspid valve
Aortic valve
Pulmonary valve
57
(Continued)
Upper Body
Deoxygenated Blood
Lungs
Oxygenated Blood
Lungs
Oxygenated Blood
Deoxygenated Blood
Lower body
58
(Continued)
Upper Body
Deoxygenated Blood
Lungs
Lungs
Deoxygenated Blood
59
(Continued)
Upper Body
Lungs
Oxygenated Blood
Lungs
Oxygenated Blood
Lower body
60
(No Transcript)
61
Circulation
  • From SV, my RA took my RV to PA for LUNch. Then
    the Pole Vaulter took it to LA and LV for the
    Awesome Opening

62
Table Talk
  • Does the structure of the human heart allow for
    oxygen rich blood to be separated from oxygen
    poor blood?
  • Which chambers are filled with oxygen poor blood
    during circulation?

63
Circulation
  • The _______ and/or the ______ vena cava bring
    O2 poor blood into the _____ ____
  • Then the RA sends blood to the _____ ________
  • The RV sends blood to the __________
  • PA send blood to the ________

superior
inferior
Right atrium
right
ventricle
pulmonary artery
lungs
64
(Continued)
  • Pulmonary veins bring O2 ______ blood back from
    the _______ into the _______ atrium
  • LA sends blood to the ______ _______
  • LV sends blood to the ________
  • Aorta sends O2 ______ blood to the rest of the
    body

rich
lungs
left
left ventricle
aorta
rich
65
Analysis Questions
  • Does the structure of the human heart allow for
    oxygen rich blood to be separated from oxygen
    poor blood?
  • Which chambers are filled with oxygen poor blood
    during circulation?
  • Arteries take blood away from the heart, which
    two structures in the heart are classified as
    arteries?
  • Veins bring blood back to the heart, which
    structures in the heart would be classified as
    veins?

66
Heartbeat
contraction
  • Is the __________ and _________ of the
    ventricles.
  • Controlled by
  • Sinoatrial Node
  • ___________

relaxation
Atrioventricular Node
67
Generation of the Heartbeat
  • SA Node
  • __________ electrical signal
  • AV node
  • Relays the signal to the ventricles
  • Ventricles __________

Creates
contract
68
Rotten Student!
  • Mrs. Rosewitz was writing the agenda on the board
    while her students worked on a lab at their
    desks. Suddenly she felt something fly past her
    head and heard two distinct smacks hit the board.
    She believes that one of her students threw fake
    blood at her. She spun around to see who the
    culprit was, but all students (suspects) seemed
    to be hard at work at their desks.
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