Download 5.3 KeyTerms

Lesson 5.3 Lymph and Blood Cells – Key Terms
Agglutination
Alleles
Antibody
Antigen
B lymphocyte (B
cell)
Blood type
(group)
Immunity
Lymph
Lymph node
Lymphocyte
Macrophage
Memory cell
Clumping of microorganisms or blood cells, typically due to an
antigen-antibody interaction.
Alternate forms of a single gene that control the same
inherited trait (such as type A blood) and are located at the
same position on homologous chromosomes.
An antigen-binding immunoglobulin, produced by B cells, that
functions as the effector in an immune response.
A foreign macromolecule that does not belong to the host
organism and elicits and immune response.
A type of lymphocyte that develops in the bone marrow and
later produces antibodies, which mediate humoral immunity.
One of the classes (as A, B, AB, or O) into which individual
vertebrates and especially human beings or their blood can be
separated on the basis of the presence or absence of specific
antigens in the blood.
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.
A usually clear fluid that passes from intercellular spaces of
body tissue into the lymphatic vessels, is discharged into the
blood by way of the thoracic duct and right lymphatic duct, and
resembles blood plasma in containing white blood cells and
especially lymphocytes but normally few red blood cells and
no platelets.
Any of the rounded masses of lymphoid tissue that are
surrounded by a capsule of connective tissue, are distributed
along the lymphatic vessels, and contain numerous
lymphocytes which filter the flow of lymph passing through the
node.
Any of the colorless weakly motile cells that originate from
stem cells and differentiate in lymphoid tissue (as of the
thymus or bone marrow), that are the typical cellular elements
of lymph, that include the cellular mediators of immunity, and
that constitute 20 to 30 percent of the white blood cells of
normal human blood.
An amoeboid cell that moves through tissue fibers, engulfing
bacteria and dead cells by phagocytosis.
A long-lived lymphocyte that carries the antibody or receptor
for a specific antigen after a first exposure to the antigen and
that remains in a less than mature state until stimulated by a
second exposure to the antigen at which time it mounts a more
effective immune response than a cell which has not been
© 2014 Project Lead The Way, Inc.
Human Body Systems Lesson 5.3 Lymph and Blood Cells – Key Terms – Page 1
Pathogen
Pedigree
T lymphocyte (T
cells)
exposed previously.
A specific causative agent (as a bacterium or virus) of disease.
A diagram of a family tree showing the heritable characters in
parents and offspring over multiple generations.
A type of lymphocyte responsible for cell-mediated immunity
that differentiates under the influence of the thymus.
© 2014 Project Lead The Way, Inc.
Human Body Systems Lesson 5.3 Lymph and Blood Cells – Key Terms – Page 2