Canadian Medical Guide > Anatomy > Cells > Blood Cells > Leukocytes > Leukocytes, Mononuclear Terms and Definitions

Leukocytes, Mononuclear

Medical Definition:	Mature LYMPHOCYTES and MONOCYTES transported by the blood to the body's extravascular space. They are morphologically distinguishable from mature granulocytic leukocytes by their large, non-lobed nuclei and lack of coarse, heavily stained cytoplasmic granules.
Guide Notes:	do not confuse with MONOCYTES; Peripheral Blood Mononuclear Cells (PBMC) unspecified goes here; prefer specific indentions
Previously Indexed:	Leukocytes (1966-1987),Lymphocytes (1966-1987),Macrophages (1966-1987),Monocytes (1966-1987)

Leukocytes, Mononuclear Categories.

	Lymphocytes - White blood cells formed in the body's lymphoid tissue. The nucleus is round or ovoid with coarse, irregularly clumped chromatin while the cytoplasm is typically pale blue with azurophilic (if any) granules. Most lymphocytes can be classified as either T or B (with subpopulations of each); those with characteristics of neither major class are called null cells.
	Monocytes - Large, phagocytic mononuclear leukocytes produced in the vertebrate BONE MARROW and released into the BLOOD; contain a large, oval or somewhat indented nucleus surrounded by voluminous cytoplasm and numerous organelles.

Leukocytes, Mononuclear Medical Definitions and Terms

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