lymph nodes:
stationary lymphatic tissue along the path of lymph vessels all over the body
thoracic duct:
large lymph vessel in the chest that drains lymph from the lower part and left side of the body above the diaphragm
spleen:
organ near the stomach that produces, stores, and eliminates blood cells
adenoids:
mass of lymphatic tissue in the nasopharynx
thymus gland:
organ in the mediastinum that conditions T lymphocytes and helps in the immune response
lymph capillaries:
tiniest lymph vessels
right lymphatic duct:
large lymph vessel in the chest that drains lymph from the upper right part of the body
interstitial fluid:
fluid present between cells that becomes lymph as it enters the lymph capillaries
inguinal nodes:
groin region
axillary nodes:
armpit region
cervical nodes:
neck (of the body) region
mediastinal nodes:
space between the lungs in the chest
dendritic cell:
cell that digests foreign cells and helps B and T cells mark antigens for destruction
complement system:
proteins that help antibodies and T cells kill their target
helper T cell:
T4 cell that aids B cells in recognizing antigens
macrophage:
large phagocyte found in lymph nodes and other tissues of the body
plasma cell:
cell that originates from a B lymphocyte and secretes antibodies
suppressor T cell:
treg cell that inhibits the activity of B and T lymphocytes
immunoglobulins:
antibodies-IgA, IgE, IgG, IgM, IgD
toxins:
poisons (antigens)
cytotoxic T cells:
T lymphocytes that directly kill foreign cells (T8) cells
interferons:
antiviral proteins secreted by T cells
lymph:
clear, watery fluid that surrounds body cells
immune system:
the defense of the body against foreign organisms such as bacteria and viruses
natural immunity:
protection that is inherited and is present at birth to fight off infection
acquired immunity:
body's ability to form antibodies and mobilize lymphocytes to fight an infection after exposure to an antigen
vaccination:
by exposing a person to proteins, killed viruses, or bacterial components, it is possible to stimulate lymphocytes to produce antibodies, they protect against an attack of the disease, should the person be exposed to the virus at a later time
immun-
protection
lymph-
lymph
lymphaden-
lymph node
splen-
spleen
thym-
thymus gland
tox-
poison
ana-
again, anew
inter-
between
AIDS:
(acquired immunodeficiency syndrome) group of clinical signs and symptoms associated with suppression of the immune system and marked by opportunistic infections, secondary neoplasms, and neurologic problems, caused by HIV
allergy:
abnormal hypersensitivity acquired by exposure to an antigen
systemic anaphylaxis:
an extraordinary hypersensitivity reaction occurs throughout the body, leading to fall in blood pressure, shock, respiratory distress, and swelling
HIV:
human immunodeficiency virus, causes AIDS