Lymphatic Flashcards
what does the right lymphatic duct drain
UPPER right side of the body including the brain a 1/4 of the body
what does the thoracic duct drain
3/4 of the body including the left and lower right side
where are lymphatic capillaries found
interlaced with arterioles and venules. collagen fibers anchor the lymphatic capillary in the tissue, interstitial fluid slips through spaces between the overlapping endothelial cells that make the lymphatic capillary
cisterna chyli
a lymph node in the middle of the body
Pharyngeal tonsil
under the sphenoid bone
Palatine tonsils
on each side of the pharynx can be seen on both sides of the mouth
lingual tonsil
opposite of the palatine tonsil in the throat above the epiglotis
Lymph flow through a lymph node
Afferent lymphatic vessel (has 1 way valves)
subcapsular sinus
trabecular sinus
medullary sinus
efferent lymphatic vessel (have 1 way valves)
cells in lymph node outer cortex
B-cells around the germinal center
Cells in the germinal center:
B-cells
follicular dendritic cells
machrophages
Cells in Germinal center of lymphnode
B cells
follicular dendritic cells
macrophages
cells of the medulla (lymph node)
B cells
plasma cells
macrophages
Cells of the inner cortex (lymph node)
T cells
dendritic cells
Micrograph portion of lymphnode
capsule
subcapsular sinus
trabecula
trabecular sinus
outer cortex
germinal center in secondary lymphatic nodule
inner cortex
medullary sinus
medulla
Thymic xsection adolescent
capsule
lobule: cortex
thymic (hassall’s corpuscle
medulla
xsection of thymic medulla shows what cells adolescent
T cells
thymic (hassalls) corpuscle
epithelial cell
Function of lymphatic system
Dietary fat absorption/transport
defends the body with WBC, T+B cells
How does fat enter the lymph system
via lacteals/lymphatic capillary
Fat flow in lymph sys
fat enter through lacteal->cisterna chyli-> thoracic duct
Lymph characteristics
yellowish liquid. Like plasma but with less protein
Lymphatic vessel characteristics
like blood vessels but thinner and a lower pressure but with 1 way valves
lymphatic tissues are made of
squamous endothelium w/o basement membrane
chyle
lymph w/ lipids in it
MALT
Mucosa associated lymphatic tissue
BALT
Bronchus associated lymphatic tissue
characteristics of tonsils
unencapsulated lymphoid tissue/lymph nodules
What/ where are the tonsils
Lingula-base of the tongue
Pharyngeal/adenoid x2: post of nasopharynx
palantine x2: post o oropharynx
Lymph nodes characteristics
- capsule: dense IR collagenous CT
- outer cortex: has lymphatic nodules/germinal centers-spherical clusters of cells (primarily B lymphocytes)
- Deep to lymph nodules is an area that houses primarily T lymphocytes
- Medulla: innermost region: houses macrophages
Peyer’s patch characteristics
found in epithelial lining of small intestine/ileum: resemble lymph nodes but lymph nodules are less defined and have incomplete capsules
Lymph capillaries characteristics
Blind ended, highly permeable walls allow large substances and volume of fluid to enter and exit. has many 1 way valves, lower pressure than blood vessels
Spleen characteristics
made of 2 types of tissue
1. Red pulp: destroys old worn out cells
2. white pulp: contains phagocytes and lymphocytes
