Composition of Blood
True OR False
Blood is made of both cells (54%) and Plasma (45%).
What is False?
Cells (45%) and Plasma (55%)
The study of blood applied to crime.
What is Blood Spatter Analysis?
A grouping of blood stains constitute...... this
What is blood spatter pattern?
What are the three types of blood vessels?
What are capillaries, veins, and arteries?
Blood is made up of these two components
Blood cells and plasma
True OR False
Arterial spurting will be a lesser amount of blood than from blood from a person's veins.
What is False?
Blood sticking together as it falls maintaining a round shape- keeps the drop from flattening out when it falls on a flat surface. This along with surface tension help it to maintain a curved shape.
Antigens that are found on the surface of some erythrocytes.
What are A and B proteins?
The cells have hemoglobin and carry oxygen and carbon dioxide.
What are Erythrocytes?
The movement and the number of swings can often be documented by examining this pattern.
What is cast-off pattern?
Blood falling from a height or at a ________ _________, it overcomes blood's natural cohesiveness, and separates blood from the main droplet causing the formation of satellite droplets which are small secondary droplets around the main drop.
What is high velocity?
True OR False
You should always do presumptive tests before confirmatory tests on blood stains or blood drops.
What is True?
What is the scientific name for red blood cells?
What are erythrocytes?
When the swing of the bloody instrument is interrupted, the resulting patterns are called this.
What is cessation cast-off?
True OR False
An elongated blood drop indicates blood was traveling from the same direction when it landed.
What is False?
Swab turns pink if blood is detected after the confirmation that stains or drops are in fact blood
What is Kastle-Meyer Test or Confirmatory?
Blood is considered a tissue
What is true?
True or False
Blood that is in pools should be absorbed by gauze pad and allowed to air dry. After it dries it should be refrigerated or frozen as soon as possible. Blood should be taken to the lab within a week.
What is False?
Blood should be taken to the lab AS SOON AS POSSIBLE
When there are two or more blood spatters, a scientist can draw these lines so that it can be pinpointed which direction the blood source came from.
What is convergence?
Chemical analysis of a sample that establishes the possibility that a substance is present.
What is presumptive testing?