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Lymph organs:Function of the lymphatic system: the primary role of the lymphatic system is to
11.6 p7 move lymph a fluid containing white blood cells that helps the body get rid of Spleen: as 12cm in length the biggest lymph
toxins such as waste, and other unwanted substances such as carbon dioxide and organ as it contains a red pulps (blood-filled
water. cavities) and a white pulps (made of white
Lymph: the lymph is a clear fluid that is blood cells), the red pulps is for blood cells
made of lymphocytes which are cell are that are old/damaged. And in the white
white blood cells that attack foreign pulps screens the blood for pathogens and
bacteria and viruses. Lymph is formed foreign organism, if found the B-cells make
when the fluid that lies in between the antibodies that help kill pathogens and
spaces of the body tissues is collected
foreign organism.
through the capillaries back to the
blood via the vessels and the lymph Thymus glands: the thymus is a two lobed
node. structure is located in the chest. The
thymus as an outer layer having 3 layers:
Lymph nodes: looking like a small bean. epithelial cells, white blood cells and
This gland is around 20mm in diameter it kulchitsky cells. The function of the thymus
consist of an outer layer containing gland is to develop and train t-lymphocytes,
follicles and middle layer containing which is seen an important type of white
dendritic and T-cells, these cells leave via blood cell.
the medullary region into the Tonsils: the tonsils are located at the back
bloodstream. The function of the lymph of the throat is made up of soft tissues kind
node is used to scan for harmful of the same as the lymph nodes and
substances that are circulation in the covered by the pink mucosa. The function
body. As they contain immune cells they of the tonsils is to defend the body from
fight the infection. bacteria and viruses. As they trap the
Lymphatic vessels: lymphatic vessels are made up of three layers similar
structure to the veins as is contains a tunica intima, tunica adventitia and infection on the mucosa that we ingest and
tunica media. There are also lymph capillaries. the mucosa is ingest into the stomach acid
where it’s destroyed.
Tunica intima: this the inner layer which is made of smooth endothelium.
This also contains valves which prevent back flow of fluid.
Tunica media: this is the second layer which is made of elastic fibres and
smooth muscle tissue.
Tunica Adventitia: as being the strong outer layer of the vessel this is made
of collagen and elastic fibres this prevents the vessel from bursting under
high pressure.
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