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Lymphatic system
University of Evansville EXSS113
17
Anatomy
Undergraduate 1
04/15/2010

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Term
Immunity function of Lymphatic system
Definition
provides structural basis of the immune system
fluids from all capillary beds are filtered
immune cells stand ready to respond to foreign cells or chemicals encountered
Term
Lipid absorption function of lymphatic system
Definition
Lacteals in small intestine absorb dietary lipids
Term
Fluid recovery function of lymphatic system
Definition
abosrbs plasma proteins and fluid (2 to 4 L/day) from tissues and returns it to the blood stream
Once interstitial fluid enters lymphatics, it is called lymph
Term
Chyle
Definition
fatty lymph
Term
Lymph transport
Definition
pulsations of nearby arteries
contractions of smooth muscle in the walls of the lymphatics
Term
2 types of lymphocytes
Definition
T cells, B cells
main warriors of the immune system
Term
Macrophages
Definition
Phagocytize foreign substances and help activate T cells
Term
Dendritic cells
Definition
capture antigens and deliver them to lymph nodes
Term
Reticular cells
Definition
produce stroma that supports other cells in lymphoid organs
Term
Diffuse lymphatic tissue
Definition
comprises scattered reticular tissue elements in every body organ
Term
Lymphatic follicles (nodules)
Definition
solid, spherical bodies of tightly packed reticular elements and cells. Germinal center composed of dendritic and B cells
Term
Lymph nodes
Definition
principal lymphoid organs of the body. Filter lymph- macrophages destroy microorganisms and debris
Immune system-- lymphocytes are activated and mount an attack against antigens
Term
buboes
Definition
swollen lymph nodes
Term
cortex of lymph node
Definition
contains follicles with germinal centers, heavy with dividing B cells
Term
Dendritic cells of lymph nodes
Definition
nearly encapsulate the follicles
Term
Deep cortex of lymph nodes
Definition
houses T cells in transit
Term
Circulation in lymph nodes
Definition
lymph enters via afferent lymphatic vessels and exits the node at the hilus via efferent vessels.
Fewer efferent vessels, causing flow of lymph to stagnate, allowing lymphocytes and macrophages time to carry out functions
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