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Terms in this set (60)
parasympathetic nervous system
The lymphatic system is a system that
transports fluids and helps fight infection
what is the lymphatic system comprised of?
lymph, lymphatic capillaries, lymphatic vessels, lymphatic organs, lymphatic cells
lymphatic capillaries are like capillaries in the circulatory system except they are....?
what circulatory system vessels are lymphatic vessels similar to?
Lymphatic vessels are made of __________.
3 layers (tunics)
Function of lymphatic system
production and maturation of lymphocytes
draining excess fluids
what are lymphocytes?
subtypes of WBCs that leave bone marrow and mature in lymphatic system
if excess fluids are not drained from tissues what happens?
how are excess fluids drained from tissues?
via the lymphatic system
What percentage of fluid from blood capillaries can return to blood?
How does fluid enter lymphatic vessels?
via lymphatic capillaries
lymphatic capillaries begin as _________.
porous, close ended tubes within most tissues
The lymphatic capillaries are __________ among blood capillaries and ______________ than blood capillaries.
interspersed, more porous and less selective
What types of things enter into lymphatic system?
ISF, proteins, microorganisms, fats
specific type of lymphatic capillary that collects fats
Order of lymph flow
lymph capillaries, lymph vessels, lymphatic trunks, lymphatic ducts
what are the 2 main lymph ducts?
right lymphatic duct and thoracic duct
right lymphatic duct drains....
upper right quadrant of body
thoracic duct drains...
rest of the body
what do both the thoracic and right lymphatic duct drain into?
subclavian vein at their junctions with the internal jugular veins
pros of lymph vessels (b/c nonselective)
large proteins, fats, immune system cells can enter blood system
cons of lymph vessels (b/c nonselective)
cancer cells, bacteria can enter
Lymph nodules are
oval clusters of lymphatic cells
lymph nodules are NOT
lymph nodules do some
immune system cell production
lymph nodules may occur _______ or __________(and give example of one)
in groups, part of lymph organs, tonsils
masses of lymph nodules in nasal/oral cavities and pharynx
tonsils are usually the
first to be affected by pathogens in food
bean shaped organs that occur along lymph vessels throughout body
what are the 3 anatomical parts of lymph nodes?
capsule, cortex, medulla
what does the medulla of lymph nodes contain?
sinuses that are lined with macrophages to filter lymph
where in lymph nodes are lymph nodules found?
the cortex of lymph nodes produce _______
What are the 3 common clusters of lymph nodes? Which one can you feel at all times?
cervical, axillary, inguinal;
spleen is the ________ lymphatic organ
where is the spleen located
on left side of abdominal cavity near stomach
spleen only has a _________ unlike lymph nodes
capsule extensions= and contain?
trabeculae, blood vessels
circular clusters of cells that trabecular arteries go through
where do lymphocytes monitor blood in spleen?
what part of the spleen initiates an immune response?
red pulp of spleen
reservoir/recylcer for RBCs and platelets where trabecular veins pass through
the spleen monitors ______ while lymph nodes monitor __________.
what are side effects of living without a spleen?
more prone to infections
RBCs are destroyed rapidly
where is the thymus located?
in mediastinum, anterior to heart
the thymus ___________ as you get older
decreases in size
what kind of lymphocytes matures in the thymus?
what are the precursors to lymphocytes?
are hemocytoblasts mature or immature
what are the lymphocytes present in red bone marrow?
B and T lymphocytes
B lymphocytes _____ bone marrow and mature ______
remain in, there
T lymphocytes ________ bone marrow in _________ state, and go to __________ where they ________.
leave, immature, thymus, mature
Both B & T lymphocytes will
divide as needed
B lymphocytes produce
Both B & T lymphocytes can ___________ after mature
migrate to other lymphatic tissues
cancer of lymphatic system in which there are too many diseases lymphocytes
cancer of early blood forming cells
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