What it means
Fluid that leaks out of the blood into the tissues (interstitial fluidin-ter-STISH-ul FLOO-idThe fluid in the spaces between the body's cells, outside the blood vessels.Full entry ) is picked up by small lymph vessels and becomes lymph. It flows through lymph nodelimf nohdA small, bean-shaped organ of the immune system that filters lymph fluid and holds white blood cells.Full entry , where germs and damaged cells are filtered out, and returns to the blood near the heart. When lymph cannot drain, the area swells (lymphedema).
For the nurse
After lymph nodes are removed, as in some breast cancer surgery, teach the client to protect that arm and report swelling. Many agencies avoid blood pressures and needlesticks on that arm.
At a glance
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Related terms
lymph node
A small, bean-shaped organ of the immune system that filters lymph fluid and holds white blood cells.
immune system
The body's defense system of cells, tissues and organs that fights germs and other foreign substances.
tonsil
One of the masses of lymph tissue at the back of the throat that help fight germs entering the mouth and nose.
lymphocyte
A type of white blood cell that targets specific germs and abnormal cells, including T cells, B cells and natural killer cells.
interstitial fluid
The fluid in the spaces between the body's cells, outside the blood vessels.