Blood and Lymphatic Systems Flashcards
agglutination
the clumping of cells as a result of interaction with specific antibodies called agglutinins. Agglutinins are used in blood typing and in identifying or estimating the strength of immunoglobulins or immune serums
albumin
a plasma protein. Various of these plasma proteins are found in practically all animal tissues and many plant tissues. In blood, it helps maintain blood volume and blood pressure
allergen
a substance that can produce a hypersensitive reaction in the body
allergy
a hypersensitive reaction to normally harmless antigens, most of which are environmental
anaphylaxis
an exaggerated, life-threatening hypersensitivity reaction to a previously encountered antigen.
anisocytosis
an abnormal condition of the blood characterized by red blood cells of variable and abnormal size
antibodies
substances produced by the body in response to bacteria, viruses, or other foreign substances. Each class of antibody is named for its action.
antigens
a substance, usually a protein, that causes the formation of an antibody and reacts specifically with that antibody
ascites
an abnormal intraperitoneal (within the peritoneal cavity) accumulation of a fluid containing large amounts of protein and electrolytes.
basophil
a granulocytic white blood cell characterized by cytoplasmic granules that stain blue when exposed to a basic dye. They represent 1% or less of the total white blood cell count.
bilirubin
the orange-yellow pigment f bile formed principally by the breakdown of hemoglobin in red blood cells after termination of their normal life span.
coagulation
the process of transforming a liquid into a solid, especially of the blood
corpuscle
any cell of the body; a red or white blood cell
differentiation
a process in development in which unspecialized cells or tissues are systemically modified and altered to achieve specific and characteristic physical forms, physiologic functions, and chemical properties.
dyscrasia
an abnormal condition of the blood or bone marrow, such as leukemia, aplastic anemia, or prenatal Rh incompatibility.
edema
the abnormal accumulation of fluid in interstitial spaces of tissue
electophoresis
the movement of charged suspended particles though a liquid medium in response to changes in an electric field. Charged particles of a given substance migrate in a predictable direction and at a characteristic speed.
enzyme
an organic substance that initiates and accelerates a chemical reaction
eosinophil
a granulocytic, bilobed leukocyte somewhat larger than a neutrophil characterized by large numbers of coarse, refractile, cytoplasmic granules that stain with the acid dye eosin.
erythremia
an abnormal increase in the number or red blood cells
erythroblast
an immature red blood cell
erythrocyte
a mature red blood cell
erythropoiesis
the process of red blood cell production
erythropoietin
a hormone synthesized mainly in the kidneys and released into the bloodstream in response to anoxia (lack of oxygen). The hormone acts to stimulate and regulate the production of erythrocytes and is thus able to increase the oxygen-carrying capacity of the blood.
fibrin
a stringy, insoluble protein that is the substance of a blood clot.
fibrinogen
a plasma protein converted into fibrin by thrombin in the presence of calcium ions
globin
a group of four globulin protein molecules that become bound by the iron in heme molecules to form hemoglobin.
globulin
a plasma protein made in the liver. It helps in the synthesis of antibodies.
granulocyte
a type of leukocyte characterized by the presence of cytoplasmic granules.
hematologist
a medical specialist in the field of hematology
hematology
the scientific study of blood and blood-forming tissues.
heme
the pigmented, iron-containing, nonprotein portion of the hemoglobin molecule. Heme binds with and carries oxygen in the red blood cells releasing it to tissues that give off excess amounts of carbon dioxide.
hemoglobin
a complex protein-iron compound in the blood that carries oxygen o the cells from the lungs and carbon dioxide away from the cells to the lungs.
hemolysis
the breakdown of red blood cells and the release of hemoglobin that occurs normally at the end of the life span of a red cell.
hemorrhage
a loss of a large amount of blood in a short period of time, either externally or internally. May be arterial, venous, or capillary.
hemostatis
the termination of bleeding by mechanical or chemical means or by the complex coagulation process of the body, consisting of vasoconstriction, platelet aggregation, and thrombin and fibrin synthesis.
heparin
a naturally occurring anticlotting factor present in the body.
hyperalbuminemia
an increased level of albumin in the blood.
hyperbilirubinemia
greater than normal amounts of the bile pigment, bilirubin, in the blood.
hyperlipemia
an excessive level of blood fats, usually caused by a lipoprotein lipase deficiency or a defect in the conversion of low-density lipoproteins to high-density lipoproteins; also called hyperlipidemia
hyperlipidemia
an excessive level of blood fats, usually caused by a lipoprotein lipase deficiency or a defect in the conversion of low-density lipoproteins to high-density lipoproteins; also called hyperlipemia
ion
an electrically charged particle
leukocyte
a white blood cell, one of the formed elements of the circulating blood system.
leukocytopenia
an abnormal decrease in number of white blood cells to fewer than 5,000 cells per cubic millimeter.
megakaryocyte
an extremely large bone marrow cell
monocyte
a large mononuclear leukocyte
myeloid
of or pertaining to the bone marrow or the spinal cord.
neutrophil
a polymorphonuclear (multilobed nucleus) granular leukocyte that stains easily with neutral dyes.
pancytopenia
a marked reduction in the number of the red blood cells, white blood cells, and platelets
pica
a craving to eat unusual substances (non-food substances), including but not limited to things such as clay, dirt, starch, chalk, glue, ice and hair. This appetite disorder occurs with some nutritional deficiency states such as iron deficiency anemia. It may also occur in pregnancy
plasma
the watery, straw-colored, fluid portion of the lumph and the blood in which the leukocytes, erythrocytes and platelets are suspended.
platelet
a clotting cell; a thrombocyte
prothrombin
a plasma protein precursor of thrombin. It is synthesized in the liver if adequate vitamin K is present.
reticulocyte
an immature erythrocyte characterized by a meshlike pattern of threads and particles at the former site of the nucleus
septicemia
systemic infection in which pathogens are present in the circulating bloodstream, having spread from an infection in any part of the body
seroconversion
a change in serologic tests from negative to positive as antibodies develop in reaction to an infection or vaccine.
serology
the branch of laboratory medicine tat studies the blood serum for evidence of infection by evaluating antigen-antibody reactions.
serum
the clear, thin, and sticky fluid portion of the blood that remains after coagulation. It contains no blood cells, platelets, or fibrinogen
splenomegaly
an abnormal enlargement of the spleen
stem cell
a formative cell; a cell whose daughter cells may give rise to other cell types.
thrombin
an enzyme formed from prothrombin, calcum, and thromboplastin in plasma during the clotting process. It causes fibrin, which is essential in the formation of a clot.
thrombocyte
a clotting cell; a platelet
thrombocytopenia
an abnormal hematologic condition in which the number of platelets is reduced.
thromboplastin
a complex substance that initiaties the clotting process by converting prothrombin into thrombin in the presence of calcium ion.
thrombus
a clot
anemia
a condition in which there is a decrease in hemoglobin in the blood levels below the normal range, resulting in a deficiency of oxygen being delivered to the cells
anemia, aplastic
it is characterized by pancytopenia - an inadequacy of the formed blood elements (RBCs, WBCs, and platelets); also called bone marrow depression
anemia, hemolytic
it is characterized by the extreme reduction in circulating RBCs due to their destruction.
anemia, iron deficiency
it is characterized by deficiency of hemoglobin level due to a lack of iron in the body. There is a greater demand on the stored iron than can be supplied by the body.
anemia, pernicious
results from a deficiency of mature RBCs and the formation and circulation of megaloblasts (large, nucleated, immature, shape formation) and anisocytosis (RBC size variation.
anemia, sickle cell
a chronic, hereditary form of hemolytic anemia in which the RBCs become shaped like a crescent in the presence of ow oxygen concentration.
granulocytosis
an abnormally elevated number of granulocytes in the circulating blood as a reaction to any variety of inflammation or infection.
hemochromatosis
a rare iron metabolism disease characterized by iron deposits throughout the body, usually as a complication of the hemolytic anemias.