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Glossary of Terms

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The tube that empties urine from the bladder.


Puncturing a vein in order to obtain blood samples, to start an intravenous drip, or to give medication.


A medication or agent that may cause blistering.


A tiny infectious agent that is smaller than bacteria. The common cold is caused by a virus.


Organic substances essential to nutrition, can be taken naturally in foods or artificially in pill form.


(White blood count) The actual number of white blood cells seen in a blood sample.

White blood cells

(leukocytes) They help defend the body against germs, viruses and bacteria. There are different types of white blood cells. Each has a special role to play in protecting the body against infection. The 3 main types of white blood cells are granulocytes,... more

White blood count

(WBC) The actual number of white blood cells seen in a blood sample.


High-energy electromagnetic radiation used to create a 2-D picture of the body.


A rare elemental metal. A radioactive form of yttrium is used in radiation therapy and some types of immunotherapy.

Zinc sulfphate

A substance required for cell growth and tissue repair.