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Lymphatic System
Chapter 20
44
Anatomy
Undergraduate 2
06/14/2012

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Term
term 1
Definition
definition 1
Term
4 main functions of Lymphatic system
Definition
Fluid Recovery, Immunity, Lipid absorption, and Transportation.
Term
Fluid Recovery
Definition
Recovers 2-4 Liters of fluid not reabsorbed back into the capillaries and 1/4 protiens.
Term
Immunity
Definition
Surviellence and defense, filters out blood lymph for pathogens, cancer cells, and other foreign substances.
Term
Lipid absorption
Definition
Lipids absorbed by lacteals in the intestinal vili. Stomach breaks everything down and lacteals absorb fats.
Term
Transportation
Definition
Lympocyte highway, also transports hormones, some nutrients, waste products, pathogens, metastic caner cells.
Term
Lacteals
Definition
lymphatic vessels that absorb lipids due to the structure of lipids. Structure=long chain of fatty acids and ditriglycerides that can't be absorbed by small intestinal capillaries
Term
Structure of Lymp
Definition
Clear, colorless (milky white in lacteals). Originates as ISF surrounding capillaries so it's similar to plasma. Contains fluid, metastatic tumor cells, hormones, pathogens, WBC.
Term
Lymphatic Capillaries
Definition
Interspersed with blood capillaries in the capillary bed. Excess fluid and some solutes from capillary filtration are recovered by lymphatic capillaries. Your bodies "storm drain" system.
Term
Lymphatic Capillaries 2
Definition
Dead end tubes-more permeable than blood capillaries. Shingle arrangement of endothelial cells. Anchoring filaments that pull cells apart when fluid increases. increased pressure in the IF PUSHES the flaps open, letting fld into the lymph capillaries
Term
Edema
Definition
If your lymphatic system does not work properly you may get edema
Term
Where is lymph found?
Definition
Presented in tissues only. Not in CN system b/c CN NS has CSF. Also not presented in bone marrow, teeth, epidermis, cartilage, and cornea.
Term
Lymphatic Pathway
Definition
Lymphatic capillaries drain into larger lymphatic vessels-then Lymphatic trunks-then lymphatic ducts- *Right lymphatic duct and thoracic duct and finally subclavian veins.
Term
Cisterna chyli
Definition
lymphatic sac in lower thorax that drains interstinal lymph and is filled with chyle.
Term
Right lymphatic duct
Definition
Drains the right head and neck, the righ upper extremity and the right thoracic cavity. HAT-head, right arm, thorax.
Term
Thoracic duct
Definition
all other lymph drain here. Left head, L-abdomen, R & L legs.
Term
What makes lymph travel
Definition
Rhythmic contrations of lumph vessels, lymph fluid stretches lymph vessel, automatic contration of smooth muscle in lymphatic vessel wall. Other factors include valves-prevent backflow, skeletal muscle and respiratory pump, arterial pulsation, rapid flowing of blood od subclavian veins.
Term
Lymphocytes
Definition
NK cells 5%-T-lymphocytes 80%-B-Cells 15%
Term
Natural killer cells
Definition
Roam body looking for pathogens etc…
Term
Macrophages
Definition
phagocytes derived from monocytes. Function as APC's. alert the specific immune system.
Term
APC
Definition
Eat bad guys, take part of the bad guy and wear it on ther shirt. Therefore, other cells are activated when they see the bad guy on his shirt.
Term
Other APC
Definition
Dendritic cells and B cells.
Term
Lymphatic tissues
Definition
Scattered lymphocytes, MALT-mucous associated LC BALT-Respiratory tract, GALT-digestive tract.
Term
Lymph Follicles or Nodules
Definition
Dense oval shaped, no capsule, lots of lymphocytes, stand alone or appear in clusters, Peyer's Pathes, or inside organs like nodes, tonsils, appendix, and spleen.
Term
Lymph node v.s. follicles
Definition
node is an organ and follicle is a tissue inside an organ/clusters of lymphocytes.
Term
Primary organs
Definition
Red bone marrow and thymus gland. Cells mature in these organs.
Term
Secondary organs
Definition
Tonsils, lymph nodes (filter lymph) and spleen (filters blood)
Term
Immunocompenent
Definition
able to recognize and respond to antigens
Term
It is a primary Lymph organ. Red bone marrow contains..
Definition
reticular cells, developing blood cells & blood sinusoids. B-bone marow T-Thymus.
Term
Thymus
Definition
Primary lymph organ. large at birth and gets smaller as adult. T-cells mature here.
Term
Tonsils
Definition
Partially encapsulated, Crypts are distinguishing feature (trap)-Located in mucous membranes protecting pharynx
Term
Lymphnode function
Definition
Only organs that filter lymph, and they activate immune response. Side note-wbc get in/out of blood vessels easily.
Term
lymphadenitis
Definition
imflammation, swelling, & enlargement o nodes. Infected nodes that are tender, enlarged, swollen, and moveable but not firm.
Term
lymphomas
Definition
firm, enlarged, swollen and firm, not moveable, and appears attached to underlying tissues.
Term
Spleen
Definition
Large organ upper left, filters blood, contains a stroma w/ thin capsule (smooth muscle) & Trabeculae (w/ reticular fibers). Parenchyma has white pulp- lymphc & macros surround ingoing arteries (sleeve). Red pulp-leaky sinuses where blood flows slowly.
Term
Spleen function
Definition
1.Fliter RBC-removes dead/defective RBC & removes pathognes, toxins, and debris. 2. Blood reservior-smooth muscle capsle contracts, splenic volume decreases 40-50% during excerise. 3. Platelet reservior-1/3 blood supply. 4..Produces RBC in fetus. 5. Immune surveillance and lymphocyte proliferation & activation.
Term
splenomegaly
Definition
enlargement of spleen. Inflammed -infectious mono. Congestive-heart failure, portal vein, obstruciton cirrhosis. Infiltrative-tumors and cysts.
Term
splenectomy
Definition
sergical removal of spleen.
Term
Reasons for spleen removal
Definition
tumors, lymphomas, polycythemia vera-overactive spleen-storing too many WBC or RBC resulting in anemia or leukopenia. And too many platelets resulting in thrombocytopenia.
Term
Elephantiasis
Definition
ring worm infection from mosquitto. Infected nodes and block flow of lymph. Results in edema & fibrosis leads to elephant-like thickening of the skin.
Term
hodgkin's and non-hodgkins disease
Definition
Distinctive abnomal chromos in cells of lymph nodes, named after dr. Does not cause pain and people can live w/it for a long time.
Term
Lymph Node
Definition
[image]
Term
Spleen Image
Definition
[image]
Term
Lymph nodes in body
Definition
[image]
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