forensic class

BLOOD TYPE A

A blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (Rb Cs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.

NEGATIVE BLOOD

Antigens are proteins on the surface of blood cells that can cause a response from the immune system. The Rh factor is a type of protein on the surface of red blood cells. Most people who have the Rh factor are Rh-positive. Those who do not have the Rh factor are Rh-negative.

PLASMA

Blood plasma is the pale yellow liquid component of blood that normally holds the blood cells in whole blood in suspension; this makes plasma the extracellular matrix of blood cells.

BLOOD SPLATTER

Bloodstain pattern analysis (BPA) is one of several specialties in the field of forensic science. The use of bloodstains as evidence is not new; however, the application of modern science has brought it to a higher level.

BLOODSTAIN PATTERN ANALYSIS

Bloodstain pattern analysis (BPA) is one of several specialties in the field of forensic science. The use of bloodstains as evidence is not new; however, the application of modern science has brought it to a higher level.

POSITIVE BLOOD

Definition. By Mayo Clinic Staff. Rhesus (Rh) factor is an inherited trait that refers to a specific protein found on the surface of red blood cells. If your blood has the protein, you're Rh positive — the most common Rh factor.

PLATES

Platelets are parts of the blood that help the blood clot. They are smaller than red or white blood cells. Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand.

BLOOD TYPE B

The ABO Blood Group System. There are four major blood groups determined by the presence or absence of two antigens - A and B - on the surface of red blood cells: Group A - has only the A antigen on red cells (and B antibody in the plasma)

BLOOD TYPE O

With regard to transfusions of packed red blood cells, individuals with type O Rh D negative blood are often called universal donors, and those with type AB Rh D positive blood are called universal recipients; however, these terms are only generally true with respect to possible reactions of the recipient's anti-A ...

UNIVERSAL DONORS

a person of blood group O, who can in theory donate blood to recipients of any ABO blood group.

RH FACTORS

an antigen occurring on the red blood cells of many humans (around 85 percent) and some other primates. It is particularly important as a cause of hemolytic disease of the newborn and of incompatibility in blood transfusions.

BLOOD TYPES

another term for blood group.

DNA

deoxyribonucleic acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information. the fundamental and distinctive characteristics or qualities of someone or something, especially when regarded as unchangeable. "diversity is part of the company's DNA"

RED BLOOD CELLS

less technical term for erythrocyte.

WHITE BLOOD CELLS

less technical term for leukocyte.

PHENOLPHTHALEIN

phenolphthalein is a presumptive test that reacts with the heme molecule present in blood. The phenolphthalein test is used to presumptively test for the presence of blood. My question has to do with the preparation of the phenolphthalein indicator.