Dictionary > Thoracic duct

Thoracic duct

Definition
noun, plural: thoracic ducts
The lymphatic duct through which lymph from most of the peripheral lymph nodes drains, and also through which the recirculating lymphocytes that have left the circulation in the lymph node return to the blood
Supplement
In human lymphatic system, the biological system is mainly comprised of lymphatic vessels, lymph nodes, and lymphatic tissues. The lymphatic vessels are the channels that carry lymph, the clear alkaline fluid. The lymphatic vessels include the lymph capillaries, the collecting (contractile) lymph vessels, and the lymphatic ducts. The lymphatic ducts are the channels in the lymphatic system that convey lymph into the subclavian vein consequently returning the lymph to the venous circulation. In humans, there are two lymphatic ducts: (1) right lymphatic duct and (2) thoracic duct. The right lymphatic duct drains lymph fluid from the upper right section of the trunk, the right arm, and the ride side of the head and neck. The rest of the body is drained by the thoracic duct.
The thoracic duct is the largest lymphatic vessel in human lymphatic system. It is typically 38 to 45 cm in length and with a diameter of about 5 mm. In particular, it collects lymph from the left side of the body above the diaphragm and all parts below the diaphragm. It particularly conveys chyle, i.e. a bodily fluid consisting of lymph and emulsified fats.
Synonym(s):

  • ductus thoracicus
  • Pecquet duct
  • van Hoorne’s canal
  • left lymphatic duct
  • alimentary duct
  • chyliferous duct

See also:

  • lymph duct
  • right lymphatic duct
  • lymphatic vessel


    You will also like...

    Neurology of Illusions
    Neurology of Illusions

    Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

    Birth Control and Contraception
    Birth Control and Contraception

    Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

    Cell Respiration
    Cell Respiration

    Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

    Evolution of Life - Ancient Earth
    Evolution of Life – Ancient Earth

    Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..

    human respiratory system
    Respiration

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

    Peppered moth ("Biston betularia") melanic and light form
    Examples of Natural Selection

    Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..