Blood Type
Blood that contains both A and B agglutinogens is known as __________ blood?
Type AB blood
The most abundant cells in our blood. They are produced in the bone marrow and contain a protein called hemoglobin that carries oxygen to our cells.
Red Blood Cells
What does BPA stand for?
Bloodstain pattern analysis
Bloodstains created from the application of force to the area where the blood originated.
Spatter
Donor: O-
Recipient: O+
Determine if the blood would clot or not.
No clotting
Universal Donor, + can receive both + and -
What blood type is most common?
type O blood
They are part of the immune system and destroy infectious agents called pathogens.
White Blood Cells
List 2 things an investigator can learn from the analysis of a blood spatter.
⮞ Type and velocity of weapon
⮞ Number of blows
⮞ Handedness of assailant (right or left-handed)
⮞ Position and movements of the victim and assailant during and after the attack
⮞ Which wounds were inflicted first
⮞ Type of injuries
⮞ How long ago the crime was committed
⮞ Whether death was immediate or delayed
The place from where the blood spatter came from or originated.
Origin/Source
Donor: A+
Recipient: A-
Determine if the blood would clot or not.
Blood that does NOT contain any A and B agglutinogens is known as ____________ blood?
The clotting factors that are carried in the plasma; they clot together in a process called coagulation to seal a wound and prevent a loss of blood.
Platelets
How is blood evidence detected at a crime scene?
Using either a light source or blood reagent tests
The angle at which a blood droplet strikes a surface.
Angle of Impact
Donor: O+
Recipient: A+
Determine if the blood would clot or not.
No clotting,
universal donor and + can get +
Your blood type is determined by your _______, which you inherit from your parents.
genes
This is the yellowish liquid portion of blood that contains electrolytes, nutrients and vitamins, hormones, clotting factors, and proteins such as antibodies to fight infection.
plasma
Give an example of a light source detection test.
Luminol, Fluorescein, or LCV (Leuco Crystal Violet)
The pointed edges of a stain that radiate out from the spatter; can help determine the direction from which the blood traveled.
Spines
Donor: B-
Recipient: O-
Determine if the blood would clot or not.
Which blood type is known as the universal donor?
Type O
Can be analyzed to determine blood type and DNA, which can be matched to possible suspects.
Blood samples
Draw me a parent drop along with a satellite spatter.
Drawing will vary
Patterns that occur when a force is applied to the source of the blood
Includes low, medium, or high impact spatters, cast-off, arterial spurting, expiratory blood blown out of the nose, mouth, or wound.
Projected Bloodstains
Donor: AB-
Recipient: AB+
Determine if the blood would clot or not.
No clot
AB can only get AB, + can get - blood