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lymphatic fluid consists of:
-interstitial fluid(like blood plasma)
-lymphocytes-cells responsible for immune response
-macrophages of various types
Functions of lymphatic system
1-produce, maintain, and distribute lymphocytes
2-maintain normal blood volume and eliminate local variations in the chemical composition of interstitial fluid
3-Provide an alternative route for the transport of hormones, nutrients, and waste products
lymphatic capillary walls?
endothelial cells that overlap instead of being tightly bound to one another; acts as a one way valve to let fluid in but not letting it escape
lymphatic capillaries in the small intestine that transport lipids absorbed by the digestive tract
vascular capillaries lets out fluid but lymph system cant remove it; tissues become swollen
found in subcutaneous layer of skin, loose con. tissue of mucous membranes lining the digestive, reproductive, respiratory and urinary tracts, and loose con. tissue of serous membranes lining pleural, pericardial, and peritoneal cavities
large lymph vessels that accompany deep arteries and veins, that collect lymph from skeletal muscles and other deep stuff
what lymphatic trunks r there?
lumbar trunks, intestinal trunks, bronchomediastinal trunks, subclavian trunks, and jugular trunks
collects lymph from both sides of body inferior to the diaphragm and from the left side of the body superior to the diaphragm
an enlarged pouch on the thoracic duct that serves as a storage area for lymph moving toward its point of entry into the venous system
cell mediated immunity
when immunity relies on lymphoctyes, like helper and killer t cells, the first type of t cells activating the latter, which ruptures macrophage and kills the infected cell
who assists in regulation and coordination of immune response?
helper t cells and suppressor t cells
largest lymph organ, removes abnormal blood cells and other stuff through phagocytosis, storage of iron recycled from broken down rbc's, and initiation of immune responses by B cells and T cells in response to antigens in the circulating blood
Microscopic connection to circulatory system
begin in bone marrow
then thymus cells
attack abnormal cells in body
macroscopic connection to circulatory system(collecting vessels)
lymphatic trunks(empty into collecting vessels)
thoracic duct(collects from most of left body and some right)
cisterna chyli(base of lymphatic duct collects from inferior of body
right lymphatic duct(collects lymph from right upper body
antibody mediated immunity
attack by circulating antibodies released by the plasmocytes derived from activated B cells
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