Chapter 20 Flashcards
What are the organs of the lymphatic system
bone marrow, spleen, thymus, lymph nodes, lymphatic vessels
What is lymph
clear to white fluid made of WBCs, not blood or plasma
How do filaments function in lymphatic vessels
cell adhere to substrate
Where are lacteals located
vessels that serve the small intestine
What do lacteals do
route for drainage of dietary lipids and lipid soluble nutrients
What are the names of the lymphatic trunks
jugular, subclavian, bronchomediatinal, and lumber
What are the mechanism of lymph transport
skeletal muscle, respiratory movement and contraction of smooth muscle
what is Lymphedema
swelling due to build up of lymph fluid in the body
What do reticular cells do
synthesize collagen to make reticular fibers
What is the function of reticular connective tissue
form stroma and provide structural support
Where is diffuse lymphoid tissues
skin and mucous membranes
What are germinal centers made of
mainly B cells
What is the function of secondary organs
maturation of B cells and T cells
What are the two primary functions of lymph nodes
filter lymph, defend against infection
What kinds of cells are in the medulla of the lymph node
antibody secreting plasma cells, B cells and macrophages
What are lymph sinuses
space between the capsule and cortex for lymph movement
What is a hilus
an indentation in the surface of an organ where blood vessels ducts or nerve fibers
What are the effects of having less efferent lymphatic vessels than afferent lymphatic vessels
allows lymph to accumulate in lymph nodes
Why does lymph accumulate in lymph nodes
allows more time for cleansing
what is Lymphadenitis
enlargement in one or more lymph nodes
What is lymphadenopathy
swelling of the lymph nodes
What is metastasis
cancerous cells break free from original tumor, travel to other sites in the body, and establish tumors
What is the largest lymphoid organ
the spleen
What is the function of the spleen
filter blood and lymph
What is the function red pulp
blood filtration
What is the function of white pulp
filter lymph
What happens when someone has a splenectomy
liver and bone marrow macrophages take over functions
Why are MALT tissues in mucous membranes
protect the linings of body
what are the Largest collections of MALT
tonsils, peyer’s patches, appendix
What is the function of tonsils
filter out germs that enter through mouth and nose
What do peyers patches destroy
pathogens and tumors
What is the function of appendix
serves as a reservoir for good bacteria
What is the function of thymus
surveillance and protection
What does the medulla of the thymus contain
t-lymphocytes increased numbers of epithelial cells with pale nuclei
