Blood Type
The four blood types of humans.
What are A, B, AB and O.
These are the two types of antigens found on the surface of blood cells.
What are A and B?
This is a blood spatter when blood is blown out of the mouth or nose.
What is expired blood?
This type of blood spatter breaks apart blood into smaller pieces.
What is impact or high velocity spatter?
The angle formed between the direction of a blood drop and the surface it strikes.
What is the angle of impact?
The primary function of a white blood cell
What is fights or protects from infections?
Four things blood spatter analysts study when at the scene of the crime.
What is: 1) type of weapon, 2) direction that the blood was traveling, 3) angle of impact and 4) velocity of the blood, and 5) origin of the blood.
Bloodstain drop(s) created or formed by the force of gravity acting alone.
What is a passive drop?
This is the blood spatter in the area of the injury or trauma.
What is impact blood spatter?
The fluid portion of blood. Where antibodies are located.
What is plasma?
As height is increased, the size of the blood droplet ___________.
What is increase?
This is blood that has been dispersed but is still attached to the main blood drop.
What is a spine?
These clot blood.
What are platelets?
The size of a blood droplet would be __________________ on glass than it would be on carpeting. (smaller/larger)
What is larger?
The common point (area), on a two-dimensional surface, over which the directionality of several blood drops can be retraced.
What is the area of convergence?
This is the additional identifying factor for blood type. (- & +)
What is Rh?
Proteins in the blood that destroy bacteria, viruses, or other harmful toxins, producing an immune response.
What are antibodies?
This type of blood spatter results from blood existing the body under pressure from a breached artery.
What is arterial spurt/spatter?
A bloodstain pattern created when someone attempts to clean blood from a crime scene. Can be viewed using luminol.
What is a wipe pattern?