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Lymphatic System
Lymphatic System, Lymphatic Organs, Lymph Nodes
25
Anatomy
Undergraduate 2
04/19/2012

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Term
Lymph
Definition
means clear water. It is leaked fluid at the site of the capillaries becoming a part of the interstitial fluids. As much as three liters daily .
Term
two semi-independent parts of the lymphatic system
Definition
Network of lympatic vessels

Lymphoid tissues and Organs 
Term
Network of lymphatic vessels
Definition
transport any fluids  that have leaked out of the blood vascular system back to the vena cava before it enters the heart.
Term
Lymphoid Tissues and Organs
Definition
House phagocytic cells and lyphocytes to help in the body's defense mechanism and resistance to disease.
Term
Lymph Nodes
Definition

Contain and store B&T lymphocytes  and macrophages for the purpose of fighting off infections.

Can be found all over the body located in areas where the vessels are able to converge.

are bean shaped and are less than 2.5 cm in length.

Term
Lymph node function 1
Definition

 to filter lymph fluid using macrophages in the medullary region to kill microorganisms and other debris before fluid reenters the blood.

 

Term
Lymph node function 2
Definition
play a role in activating the immune response utilizing lymphocytes  located throughout the node.
Term
Cisterna Chyli
Definition
means sac of juice
Term
germinal center 
Definition
where b-cells divide
Term
follicle of the node
Definition
t-cells in transit are found here
Term
Medullary sinus
Definition
where macrophages are located
Term
Lymphatic capillaries
Definition
from here the lymph can travel to lymph nodes, trunks, and ducts, to finally reach the heart.
Term
Lymphatic organs
Definition
spleen, thymus, tonsils, peyer's patch
Term
Lympatic organs
Definition
aggregates of lymphatic tissue, all composed of loose connective reticular tissue.
Term
Spleen
Definition
the size of a fist, functions similar in function to that of a lymph node but in addition it has other properties.
Term
Spleen functions
Definition

-blood cleaning aspects (removing aged cells, bacteria, viruses, debris, and toxins)

- Stores some of the breakdow n products of red blood cells

-Stores some platelets

-a site for erythrocyte production in the fetus.

Term
red pulp
Definition
where red blood cells are disposed and blood borne pathogens are dealt with 
Term
white pulp
Definition
primarily where lymphocytes and macrophages are contained
Term
Thymus
Definition

functions to mature t-cells by secreting thymosin and thymopoietin.

Happens during the early years of life and then the thymus begins to degenerate after adolescence.

Term
Hassall's corpuscles
Definition
 areas of degenerative cells within the thymus
Term
diffevent tonsil location
Definition
palatine, lingual, pharyngeal, and tubal
Term
Tonsils
Definition
Located arounf the entrance to the pharynx. They are named by their location: Lingual, Paletine, Pharyngeal , and tubal.
Term
Tonsil function
Definition
crypts trap bacteria and particulate matter allowing for the bacteria  to travel into the tonsil where it can later be destroyed and thus create memory cells.
Term
Peyer's Patch
Definition
function with the appendix to fight off the bacteria and potential infection in the digestive tract. They also create memory lymphocytes for future infections.
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