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Definition of Tissue

Tissue: A tissue in medicine is not like a piece of tissue paper. It is a broad term that is applied to any group of cells that perform specific functions. A tissue in medicine need not form a layer. Thus,

  • The bone marrow is a tissue;
  • Connective tissue consists of cells that make up fibers in the framework supporting other body tissues; and
  • Lymphoid tissue is the part of the body's immune system that helps protect it from bacteria and other foreign entities.
Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=5800
Last Editorial Review: 8/29/1999

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