Blood Spatter Key Terms


Terms in this set (...)

What type of evidence is blood typing?
class evidence
What type of evidence is DNA profiling?
individual evidence
Which blood cell contains DNA, red or white?
white cells
By using blood spatter, it is possible to note (list five)
1. the direction from which the blood originated
2. the angle of impact
3. the point of origin of the blood
4. resulted from a high- or low-velocity impact
5. indicates the type of weapon used
In 500 BC, the Greeks distinguished?
between arteries and veins
In 1659, Anthony Leeuwenhoek viewed?
blood cells with microscope
In 1901, Karl Landsteiner discovered?
three blood types: A, B, O
In the 1900's, Karl Landsteiner discovered
Rh protein
In the 1900's, Kastle developed?
first presumptive blood test
What can a blood presumptive test rule out?
the possibility that a fluid is blood
What does a presumptive blood test rely on?
chemicals that will change color when in the presence of blood.
What is blood?
a circulating tissue consisting of there types of cells
Name the three types of cells found in blood.
red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes)
Describe plasma.
a liquid that cells are suspended in; carries dissolved proteins, such as antibodies, hormones, and clotting factors, and nutrients such as glucose, amino acids, salts, and minerals
What do red blood cells carry?
respiratory gases mainly oxygen and carbon dioxide
Name two roles for the hemoglobin in the blood.
hemoglobin binds to oxygen in the lungs and transports the oxygen to cells in all the tissues in the body; responsible for the red color in blood
Explain the role of white blood cells.
fight disease and foreign invaders
Explain the role of platelets in the blood.
aid in blood clotting
the clumping of molecules or cells caused by an antigen-antibody reaction
proteins secreted by white blood cells that attach to antigens
antigen-antibody response
a reaction in which antibodies attach to specific antigens
any foreign substance or cell in the body that reacts with antibodies
cell-surface protein
proteins embedded in the cell membrane
lines of convergence
a 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
point of origin
a three-dimensional view formed using lines of convergence and angles of impact of at least two different drops of blood to identify the source and location of blood splatter
red blood cells
donut-shaped cells that carry oxygen throughout the body
satellite drop of blood
secondary drop formed when some blood breaks free from the main contact drop of blood
white blood cells
cells that police the body by destroying foreign materials
Blood spikes
extensions of blood that don't break free from parent blood droplet
terminal velocity
the upward force of resistance equals the weight of the falling object