body fluid evidence (blood) Flashcards
what four things make up blood?
red blood cells
white blood cells
plasma
platelets
the average adult has about … liters of blood inside of them and that blood makes up …% of their body weight
5
7-8%
true or false… is blood a living tissue?
true
how many red blood cells are there in 2-3 blood drops
about one billion
for every … rbcs, there are … platels and … white blood cells
600
40
1
how many days can a rbc live for?
120 days
under low oxygen conditions the body makes more red blood cells. what can this determine?
elevation and location of the person
which organism has rbcs with no nucleus?
humans and other mammals
which organisms have rbcs with a nucleus
birds, reptiles, and lower invertebrates
what are the three blood alleles?
A, B, and O
what are the six possible blood combinations?
AA, AO, BB, BO, AB OO
what would happen if a RH- mother had an RH+ baby?
the mother would build antibodies against the RH+ and the second baby would get hemolytic disease
what agglutinogens (sprinkles) and agglutinin does type A have?
A
b
what agglutinogens (sprinkles) and agglutinin does type B have?
B
a
what agglutinogens (sprinkles) and agglutinin does type AB have?
A and B
none
what agglutinogens (sprinkles) and agglutinin does type O have?
none
a and b
with RH, what does (-) and (+) mean?
(-) does not have the protein
(+) does have the protein
what are the eight blood types?
A+, A-
B+, B-
AB+, AB-
O+, O-
who invented the early stages of blood typing and found the different types of blood?
Karl Landsteiner
which blood type is the universal doner?
recipient?
type O (O-)
type AB (AB+)
what are the three blood types anx what do they determine?
blood samples: blood type and DNA
blood droplets: location, movement of victim, and weapon
blood spatter: patterns
what is the kastle meyer test?
a test used to determine whether a substance is blood or not
what is the luminol test?
used to make cleaned up blood visible
what can blood pattern analysis tell?
number of blows
perpetrator left or right handed
position and movement
which wounds were inflicted first
type of injuries
age of crime
was death immediate or delayed?
what is a spatter?
blood stains created from the application of force to the origin of source
what is the origin of source?
where the blood spatter came from/originated
what is the angle of impact?
the angle at which a droplet strikes a surface
what is a parent drop?
the droplets from which a satellite spatters
what is a satellite spatter?
small drops that break from the parent spatter when it hits a surface
what is a spine?
a pointed edge of a stain: can help determine direction of travel
what are the four blood stain patterns?
passive, projected, transfer, free falling
