A thin plasma-like fluid formed from interstitial or extracellular fluid
Foreign material such as debris or bacteria is filtered from the lymph in the
Lymph nodes
The lymphatic system helps do what
Absorb fat from the digestive tract, maintain fluid balance in the body, Fight infection
In the major blood capillary beds, the internal hydrostatic pressure causes a loss of how much fluid into the interstitial spaces
3-4ml/min
What happens to the fluid that leaks out of the vessels
It must be returned to the central venous circulation via the Lymphatic vessels.
Name the 2 great lymph vessels
Thoracic ductlymphatic duct
What are the 2 roles of a lymphocyte
Fight infection, provide immunity to certain infections
Diffuse lymphatic tissue is what
tissue with no clear bounary that blends with surrounding tissues and contains lymphocytes and other cells
Name the 3 sets of lymphatic oragans that comprise the tonsils
the palatine tonsilsthe pharengeal tonsilslingual tonsils
What does the thymus produce
lymphocytes
The thymus plays a major role in what?
immunity
What other system is integrally reelated to the lymphatic system
the immune system
what is nonspecific immunity
an immune response that is predictable each time the body is exposed to a perticular challenge. The rapidity and strength of the response is the same every time
What is Specific immunity
the response to a given substance that is faster and stronger after each subsequent exposure.
Leukocytes move toward areas of bacterial invasion or forgien bodies via a process known as
Chemotaxis
Which leukocytes are usually the first cells to enter infected tissue
Neutrophils
What larger leukocyte cells are able to leave the bloodstream and enter diseased tissue
Macrophages
Name the other Leujocytes that may play a role in fighting infection
Basophils,Eosinophils Mast cells
Forgien substances are known as
Antigens (allergens)
Antibodies that are found in the plasma are produced by
B-lymphocytes, also called B-cells
What are the 5 classes of antibodies
IgG,IgM,IgA,IgE,IgD
IgG comprises how much of the total serum antibodies
80-85%
Where is IgA found
IgA is found in Saliva, Tears, and on mucus membranes
Where is IgD found
in cell membranes of B-cells.
IgE comprises how much of total serum antibody
.002%
IgM is responsible for what type of reactions
Blood transfusion
What cells carry out most cell-mediated immune functions
T effector cells
What cells aid the T effector cells
T helper cells
What cells limit the specific immune response
T surpressor cells
When activated by an antigen, T cells differentiate into what
T memory cells, and T effector cells
What cells remain in the body ready for a second challenge
Poultry
