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spleen

An organ in the upper left abdomen that filters the blood and helps fight infection.

spleen noun

Word parts

What it means

A soft, fist-sized organ under the left ribs, part of the lymph and immune systemih-MYOON SIS-tumThe body's defense system of cells, tissues and organs that fights germs and other foreign substances.Full entry . It removes old and damaged red blood cells, stores some platelets and white cells, and filters bacteria from the blood. People can live without it, but removal (splenectomy) raises the risk of serious infections. An enlarged spleen is splenomegaly.

For the nurse

The spleen bleeds heavily when injured, as in a car crash; pain in the left upper belly that spreads to the left shoulder after trauma should be reported. Clients without a spleen need certain vaccines and should report any fever quickly.

At a glance

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Also writtensplenic

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.

immunocompromised

Having an immune system that is weaker than normal at fighting infection.

megal/o

A word part that means large or enlarged.

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