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A reaction in which particles (as red blood cells or bacteria) suspended in a liquid collect into clumps and which occurs especially as a serologic response to a specific antibody.

The most prevalent protein in plasma. It was used during World War II to treat victims of shock.

Allogeneic or Allogeniec Blood
Blood from a volunteer blood donor. Also referred to as homologous blood.

An air-containing cell of the lungs.

A deficiency or a decreased number of red blood cells that causes weakness, fatigue, and pallor.

Any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response. ...

A substance that hinders the clotting of blood.

Usually a protein or carbohydrate substance (such as a toxin or enzyme) capable of stimulating an immune response.

The great arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.

Removal of blood from a donor's body, separation of a blood component (as plasma or white blood cells), and transfusion of the remaining blood components back into the donor.

Any of the tubular branching muscular- and elastic-walled vessels that carry blood from the heart through the body.

Blood that one has donated for one's self, often in preparation for elective surgery.

A fluid composed of red blood cells, white blood cells and platelets suspended in plasma. Blood flows through the human vascular system, carrying oxygen and nourishment to the body's tissues and removing carbon dioxide and other waste products from them.

The two primary divisions of the trachea that lead respectively into the right and the left lung; broadly: bronchial tubes.

A capillary tube; especially : any of the smallest blood vessels connecting arterioles with venules and forming networks throughout the body.

The organized complex of inorganic and organic substances external to the nuclear membrane of a cell and including the cytosol and membrane-bound organelles (as mitochondria or chloroplasts).

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Red blood cell.

Factor VIII -- Rich Cryoprecipitate
A glycoprotein clotting factor of blood plasma that is essential for blood clotting and is absent or inactive in hemophilia -- called also antihemophilic factor, thromboplastinogen.

A plasma protein that is produced in the liver and is converted into fibrin during blood clot formation.

A white insoluble fibrous protein formed from fibrinogen by the action of thrombin especially in the clotting of blood.

The process used to separate plasma into its component proteins.

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A microorganism; ... a microorganism causing disease.

A polymorphonuclear white blood cell (as a basophil, eosinophil, or neutrophil) with granule-containing cytoplasm.

The red blood cell molecule that carries oxygen and makes the blood red.

The quality or state of being immune; ... a condition of being able to resist a particular disease especially through preventing development of a pathogenic microorganism or by counteracting the effects of its products.

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White blood cell.

A leukocyte that helps form antibodies.

B Lymphocyte
Any of the lymphocytes that have antibody molecules on the surface and comprise the antibody-secreting plasma cells when mature.

T Lymphocyte
Any of several lymphocytes (as a helper T cell) that differentiate in the thymus, possess highly specific cell-surface antigen receptors, and include some that control the initiation or suppression of cell-mediated and humoral immunity (as by the regulation of T and B cell maturation and proliferation) and others that lyse antigen-bearing cells.

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A soft highly vascular modified connective tissue that occupies the cavities and cancellous part of most bones.

A large cell that has a lobulated nucleus, is found especially in the bone marrow, and is the source of blood platelets.

A large white blood cell with finely granulated chromatin dispersed throughout the nucleus that is formed in the bone marrow, enters the blood, and migrates into the connective tissue where it differentiates into a macrophage.

Mother-fetus incompatibility
When a mother's blood type differs from her unborn child's and her blood system produces antibodies that react to antigens on the surface of the child's red blood cells.

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A cell (as a white blood cell) that engulfs and consumes foreign material (as microorganisms) and debris.

The engulfing and usually the destruction of particulate matter by phagocytes.

The pale yellow fluid portion of whole blood that consists of water and its dissolved constituents including proteins (as albumin, fibrinogen, and globulins), electrolytes (as sodium and chloride), sugars (as glucose), lipids (as cholesterol and triglycerides), metabolic waste products (as urea), amino acids, hormones, and vitamins.

One of the minute protoplasmic disks of vertebrate blood that assist in blood clotting.

Red Blood Cells*
Any of the hemoglobin-containing cells that carry oxygen to the tissues and are responsible for the red color of vertebrate blood -- called also erythrocyte, red blood corpuscle, red cell, red corpuscle.

Rh factor
An inherited blood group like the ABO blood types. Roughly 85 percent of Americans have the Rh factor (Rh+).

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A highly vascular ductless organ that is located in the left abdominal region near the stomach or intestine of most vertebrates and is concerned with final destruction of red blood cells, filtration and storage of blood, and production of lymphocytes.

Stem Cells
An unspecialized cell that gives rise to differentiated cells. ...

The process of transfusing fluid into a vein or artery.

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Any of the tubular branching vessels that carry blood from the capillaries toward the heart.

A tube or canal (as an artery) in which a body fluid is contained and conveyed or circulated.

Any of a large group of submicroscopic infective agents that are regarded either as extremely simple microorganisms or as extremely complex molecules, that typically contain a protein coat surrounding an RNA or DNA core of genetic material but no semipermeable membrane, that are capable of growth and multiplication only in living cells, and that cause various important diseases in humans, lower animals, or plants.

White Blood Cells*
Any of the blood cells that are colorless, lack hemoglobin, contain a nucleus, and include the lymphocytes, monocytes, neutrophils, eosinophils, and basophils -- called also leukocyte, white blood corpuscle, white cell, white corpuscle.

Window period
The time interval between HIV infection and the appearance of anti-HIV antibodies.

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Used by permission. From MERRIAM-WEBSTER'S COLLEGIATE DICTIONARY® ©2001 at by Merriam-Webster, Incorporated.

*Used by permission. From MERRIAM-WEBSTER'S MEDICAL DESK DICTIONARY® ©2002 at by Merriam-Webster, Incorporated.

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