Lymphatic system Flashcards
Major components and organs- structures and roles
What are the two primary functions of the lymphatic system?
Transport tissue fluid (lymph) to blood vessels. 2. protect the body by removing foreign material (bacteria) from the lymphatic stream and serve as a site for lymphocyte “policing” of body fluids and lymphocyte multiplication
What does the lymphatic system consist of?
Lymphatic vessels, lymphatic tissues, lymph nodes, and lymphatic organs.
What are the regional lymph nodes?
Cervical lymph nodes, axillary lymph nodes, and inguinal lymph nodes
Drains from upper right extremity, head, and thorax
Right lymphatic duct
receives lymph from the rest of the body
Thoracic duct
enlarged terminus of the thoracic duct, receives lymph from digestive organs.
cisterna chyli
Where does the lymphatic system carry lymph toward?
The heart. It is a one way system
bean-shaped filters lymph is transported through, which cluster along the lymphatic vessels of the body
Lymph nodes
Where are lymph nodes typically embedded?
In connective tissue
What are the organs of the lymphatic system?
Tonsils, thymus, spleen, appendix, peyers patches
a functional system that recognizes something as foreign and acts to destroy or neutralize it
Adaptive immune response
Adaptive immune response is also known as
immune response
protects us from bacterial and viral infections, bacterial toxins, and cancerbacterial toxins, and cance
immune response
What are the most important characteristics of immune response?
Memory, specificity, and self tolerance
What are the primary lymphoid organs
Thymus and red bone marrow
What are secondary lymphoid organs ?
tonsils, spleen, peyers patches
Primary cells for immune response?
B & T cells
Which cells originate in red bone marrow?
B & T Cells
riggered when an antigen binds to the specific cell-surface receptors causing the cell to proliferate rapidly, forming clones which then become specialized (differentiate) some form memory cells, other regulatory cells
Clonal selection
when a cell is able to distinguish between self and non self
self- tolerance
involves the addition of receptors on the cell surface that recognize and bind to a specific antigen
immunocompetent
Balls of connective tissue with collections of macrophages and and lymphocytes. Filter toxins and attack disease
Lymph nodules
Main cells of the immune system
Lymphocytes
Role of lymphocytes
target specific foreign substances or antigens
Types of lymphocytes
B cells and T Cells
Antibody producing cells
B cells
Directly attack target cells
T cells
Types of T-cells
Tc cells, Ts- cells, Th-cells
help alert and stimulate B cells
TH cell
Ctoxic cell which forms an army
Tc cells
surpress immune response for specific antigens
Ts cells
True or false- lymphatic vessels are somewhat similar to veins
True
Lymphatic capillaries lead to
lymphatic vessels
Why is lymph in the thoracic duct much higher in nutrients?
Because it collects from the digestive organs
Forms lymph nodules and lymph nodes
lymphatic tissues
What are the two distinct areas of the spleen?
Red pulp and white pulp.
Strands of lymphocytes cluster around splenic artery
White pulp
Where RBC recycling occurs
Red pulp
Acts as a blood resevoir in times of blood loss
Spleen
Humoral immunity
B cells
Cellular immunity
T cell
