Dictionary > Mononuclear leukocyte

Mononuclear leukocyte

Definition
noun, plural: mononuclear leukocytes
A leukocyte characterized by having a nucleus with only one lobe, as opposed to the other type with a nucleus with several lobes
Supplement
Leukocytes (also called white blood cells) are cells of the immune system and one of the cellular elements in blood. Unlike red blood cells, the leukocytes lack the hemoglobin pigment. Similar to red blood cells though, the leukocytes came from a hematopoietic stem cell (hemocytoblast). The hemocytoblast gives rise to progenitor cells of both the myeloid series and the lymphoid series. Leukocytes from the myeloid series include the granulocytes and the monocytes whereas those from the lymphoid series include the lymphocytes and the lymphoid dendritic cells. Based on the nuclear lobes, the leukocytes may be classified as polymorphonuclear (i.e. a nucleus with more than one lobe) or mononuclear (i.e. a nucleus with only one lobe).
The mononuclear leukocytes are those possessing a large nucleus with only one lobe. In contrast, polymorphonuclear leukocytes, such as granulocytes, are those with a nucleus that has more than one lobe. The mononuclear leukocytes include the mature lymphocytes and monocytes. They are transported by the blood to the body’s extravascular space.
Variant(s):

  • mononuclear leucocyte

Compare:

  • polymorphonuclear leukocyte
  • See also:


    You will also like...

    Pollution in Freshwater Ecosystems
    Pollution in Freshwater Ecosystems

    There are many environmental factors that arise due to the usage of water in one way or another and for every action tha..

    Still Water Animals
    Still Water Animals

    Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

    Human Reproduction
    Human Reproduction

    Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

    Plant Auxins
    Plant Auxins – Phototropism & Geotropism

    Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

    Pikas are an indicator species for climate change
    Indicator Species and Endangered Species

    Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..

    human respiratory system
    Respiration

    The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..