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Chapter 6
Blood and Lymph Systems
65
Medical
Not Applicable
06/20/2005

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Term
blast/o
Definition
germ or bud
Term
chrom/o
chromat/o
Definition
color
Term
chyl/o
Definition
juice
Term
hem/o
hemat/o
Definition
blood
Term
immun/o
Definition
safe
Term
lymph/o
Definition
clear fluid
Term
morph/o
Definition
form
Term
phag/o
Definition
eat or swallow
Term
plas/o
Definition
formation
Term
reticul/o
Definition
a net
Term
splen/o
Definition
spleen
Term
thromb/o
Definition
clot
Term
thym/o
Definition
thymus gland
Term
plasma
Definition
liquid portion of the blood and lymph containing water, proteins, and cellular components (leukocytes, erythrocytes, and platelets)
Term
serum
Definition
liquid portion of the blood left after clotting
Term
erythrocyte
Definition
red blood cell which transports oxygen and CO2
Term
hemoglobin
Definition
protein-iron compound contained in erythrocytes that transports oxygen and carbon dioxide
Term
leukocyte
Definition
white blood cell, which protects the body from invading harmful substances
Term
platelets
Definition
thrombocytes; cell fragments in the blood essential for blood clotting (coagulation)
Term
immunity
Definition
process of disease protection induced by exposure to an antigen
Term
antigen
Definition
a substance that when introduced into the body, causes formation of antibodies against it
Term
antibody
Definition
a substance produced by the body that destroys or inactivates an antigetn that has entered the body
Term
active immunity
Definition
an immunity that protects the body against a future infection, as the result of the antibodies that develop naturally in resuponse to an infection or artifically after administration of a vaccine
Term
passive immunity
Definition
an immunity resulting fron antibodies that are conveyed naturally through the placenta to a fetus or artifically by injection of a serum containing antibodies
Term
pancytopenia
Definition
an abnormally reduced number of all cellular components in the blood
Term
erythropenia
Definition
an abnormally reduced number of red blood cells
Term
hemolysis
Definition
breakdown of the red blood cell membrane
Term
immunocompromised
Definition
impaired immunologic difenses caused by an immunodeficiency dirorder or therapy with immunosuppressive agents
Term
immunosupression
Definition
impaired avility to provide an immune response
Term
lyphadenopathy
Definition
enlarged (diseased) lymph nodes
Term
lymphocytopenia
Definition
an abnormally reduced number of lymphocytes
Term
macrocytosis
Definition
presence of large red blood cells
Term
microcytosis
Definition
presence of small red blood cells
Term
neutropenia
Definition
decrease in the number of neutrophils
Term
splenomegaly
Definition
enlargement of the spleen
Term
anemia
Definition
a condition of reduced number os red blood cells, hemoglobin, or packed red cells in the blood, resulting in a diminished avility of red blood cells to transport oxygen to tissues
Term
hemophilia
Definition
group of hereditary pleeding disorders with a defect in clotting factors necessary for coagulation of blood
Term
leukemia
Definition
chronic or acute malignant (cancerous) disease of the blood-forming organs, marked by abnormal leukocytes in the blood and bone marrow.
Term
lymphoma
Definition
any neoplastic disorder of lymph tissue, usually malignant, as in Hodgkin's disease
Term
metastasis
Definition
process by which cancer cells are spread by blood or lymph circulation to distant organ; "metastases" is the plural form of the term, indicating the spread to two or more distant sites.
Term
mononucleosis
Definition
viral condition characterized by an increase in mononuclear cells (monocytes and lymphocytes) in the blood along with enlarged lymph nodes (lymphadenopathy), fatique and sore throat (pharyngitis)
Term
polycythemia
Definition
increased number of erythrocytes and hemoglobin in the blood
Term
septicemia
Definition
systemic disease caused by the infection of microorganisms and their toxins in the circulatin blood
Term
thrombocytopenia
Definition
bleeding disorder characterized by an abnormally decreased number of platelets in the blood, impairing the clotting process
Term
phlebotomy
Definition
incision into or punction of a vein to withdraw blood for testing
Term
venipuncture
Definition
same as phlebotomy
Term
blood chemistry
Definition
test of the fluid portion of blood to measure amounts of chemical constituents (e.g. glucose and cholesterol)
Term
blood culture
Definition
test to diagnose an infection in the blood stream by culturinga specimen of blood to encourage the growth of microorganisims, which are then identified
Term
complete blood count
Definition
a common lab blood test performed as a screen or general health or diagnosis
Term
white blood count
Definition
a count of the number of white blood cells per cubic millimeter, ovtained by manual or automated laboratory methods
Term
red blood count
Definition
a count of the number of red blood cells per cubic centimeter
Term
hemoglobin (HGB or Hgb)
Definition
a test to determine the blood level of hemoglobin (expressed in grams)
Term
hematocrit (HCT or Hct)
Definition
measurement of the percentage of packed red blood cells in a given volume of blood
Term
differential count
Definition
determination of the nubmber of each type of white blood cell (leuckcyte) in a stained blood smear; each type is counted and reported as a percentage of the total examined

Leukocytes - normal range (25-33%)
monocytes - (3-7%)
neutrophils - (54-75%)
eosinophils - (1-3%)
basophils - (0-1%)
Term
platelet count (PLT)
Definition
calculation of the number of thrombocytes in the blood; normal range is between 150,000 to 450,000 per cubic centimeter
Term
bone marrow aspiration
Definition
needle aspiration of bone marrow tissue for pathologic examination
Term
lymphangiogram
Definition
an x-ray of a lymph node or vessel taken after injection of a contrast medium
Term
bone marrow transplant
Definition
translplantion of healthy bone marrow from a compatible donor to a diseased recipient to stimulate blood cell production
Term
lymphadenectomy
Definition
removal of a lymph node
Term
lymph node dissection
Definition
removal of possible cencer-carrying lymph nodes for pathologic examination
Term
splenectomy
Definition
removal of the spleen
Term
blood transfusion
Definition
introduction of blood products into the circulation of a recipient whise blood volume is reduced or dificient in some manner
Term
crossmatching
Definition
a method of matching a donor's blood to the recipient by mixing a sample in a test tube to determine compatibility
Term
chemotherapy
Definition
treatment of malignancies, infecitons, and other diseases with chemical agents to destroy selected cells or impair their ability to reproduce
Term
plasmapheresis
Definition
removal of plasma from the body with separations and extraction of specific elements (such as platelets) followed by reinfusion (apheresis = a withdrawl)
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