Forensics Chapter 8 Test - Blood Spatter

clumping of cells caused by an antigen-antibody response

angle at which blood strikes a target surface relative to the horizontal plane of the target surface

proteins secreted by white blood cells that attach to specific antigens

substance that provokes an immune response in the body

white blood cells recognize a substance as foreign and try to destroy it

two-dimensional view of the intersection of lines formed by drawing a line through the main axis of at least two drops of blood that indicates the general area of the source of the blood spatter

the location of a blood source viewed in three dimensions as determined by projecting angles of impact of individual bloodstains

blood projected onto a surface as a result of being flung from an object in motion

blood drop created solely as a result of gravity

smaller droplets of blood projected from larger drops of blood upon impact with a surface

elongated blood streaks radiating away from the center of a bloodstain

lateral transfer of wet blood from a moving source onto a surface; feathered edge indicates direction from source

object moves through partly dried blood with lateral motion, altering appearance

Since around 2500 BC by the Egyptians in an effort to cure disease

red blood cells, white blood cells, platelets

Plasma is what the three components of blood are carried in.

antibodies, hormones, clotting factors, nutrients such as glucose, amino acids, salts, and minerals throughout the body.

They carry respiratory gases. The hemoglobin binds to the oxygen and transports it.

They fight disease and foreign elements.

A, B, AB, O

causes most of the blood to remain in a single drop

When blood comes into contact with another surface, blood adheres to is. As a result, less blood moves forward. IN OTHER WORDS: The blood starts out wide and as it moves in a direction it gets skinnier

linear pattern of round droplets of blood

seen on walls or ceilings; pattern of lines with blood direction changing as arm moves up and back; blood flung off weapon; change in direction of blood drops

wet, bloody surface contacts a second surface, minimal lateral motion

blood exiting under pressure from an artery and striking a surface; peaks indicate heart contraction

blood blown out of nose or mouth as a result of air pressure, similar to high-velocity blood spatter, often with bubbles

area devoid of blood spatter

should be picked up in gloved hands with gauze pads or sterile cotton cloths, allow cloths to dry thoroughly before packing

Class

the presence of antigens on the surface of red blood cells and vary among individuals

Luminol

chemical tests