Blood evidence review Flashcards
how do blood droplets stay together?
cohesion
what does a toxicologist test for
presence of alcohol, drugs, and toxins
why does blood droplets stick together
adhesion
a blood drop at 90 degrees is
a circle, gravity drops
area of convergence
drawing lines through blood drops to the point it originates
calculations the area of origin of blood spatter shows
the height of a blood source
what does liquid blood need to be packaged in
plastic container
what percent of blood is plasma
55%
dried blood needs to be packaged in
paper containers
what is the liquid part of blood known as
Plasma
what gives blood its red color
hemoglobin
white blood cells
fight disease and infections in the body
what does plasma carry
antibodies, hormones, clotting factors and nutrients through the body
what do red blood cells not carry
DNA
blood type cant
positively identify a suspect
antigens on red blood cells
determine blood type
when different blood types are mixed
blood clumping or agglutination can occur and result in death
type O blood does not carry
antigens
what does the kastle-meyer test indicate
iron is present in a possible bloodstain
what do secretors have
blood-group antigens in their blood and other body fluids
gloves are worn at crimes scenes to protect
a CSI and to protect evidence from CSI
what does blood need to be kept away form
heat and sunlight ti keep it from growing bacteria
a void pattern in blood is
produced when someone or some object blocks blood from spattering on a surface
arterial gush indicates
a person has lost a large amount of blood
angle of impact (no spine)
W/L =_____2nd SIN= ____
what is the approximate location of a blood source at ground level is found
area of convergence
