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Lymphatic System Overview - Anatomy & Physiology (view source)

Revision as of 14:44, 1 July 2010

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*[[Peyer's Patches - Anatomy & Physiology|The Ileal Peyer's Patch]]

*[[Regional Lymphoid Tissue - Anatomy & Physiology|Regional lymphoid tissue]]

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The main functions of the lymphoreticular system are removal of senescent cells and production of [[Immunology|immune cells]]. Immune functions are covered broadly under the [[Primary Lymphoid Tissue - Anatomy & Physiology|primary]] and [[Secondary Lymphoid Tissue - Anatomy & Physiology|secondary]] lymphoid tissues of the [[Lymphoreticular System - Anatomy & Physiology|lymphoreticular system]]

===Removal of interstitial fluid===

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Due to their structure lymphatic capillaries are more permeable than vascular capillaries and this means that they can not only more effectively remove fluid from tissue but also take up large molecules. This allows the lymphatic system to transport large proteins as well as chylomicrons for the transport of fats. The interstitial fluid filtered into the lymphatic vessels is called lymph. As the vessels pass through lymph nodes the lymph is surveyed by immune cells before returning to the blood ensuring that antigens/pathogens from tissues are removed.

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Due to their structure lymphatic capillaries are more permeable than vascular capillaries and this means that they can not only more effectively remove fluid from tissue but also take up large molecules. This allows the lymphatic system to transport large proteins as well as chylomicrons for the transport of fats. Chylomicrons enter the lymph to eventually join the blood via the thoracic duct; this enables the lipid soluble [[Small Intestine - Anatomy & Physiology#Triacylglycerol Digestion and Absorption |triacylglycerol (TAG)]] to be transported into the blood.

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The interstitial fluid or lymph filtered into the lymphatic vessels passes through lymph nodes and is surveyed by immune cells before returning to the blood ensuring that antigens/pathogens from tissues are removed.

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~~===Transport of lipids===~~

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Chylomicrons ~~are too large to enter the capillaries but instead~~ enter the lymph to eventually join the blood via the thoracic duct.

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~~This~~ enables the lipid soluble [[Small Intestine - Anatomy & Physiology#Triacylglycerol Digestion and Absorption |triacylglycerol (TAG)]] to be transported into the blood.

==Test yourself on the lymphoreticular flash cards==

Suzannah.stacey

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