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Lymphatic System
Lab IX
20
Anatomy
Undergraduate 2
04/23/2012

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Cards

Term
What is the principal function of the lymphatic system?
Definition
collect excess extracellular fluid from tissues and return it to the cardiovascular system
Term
What is lymph?
Definition
fluid in the lymphatic vessels
Term
What is the function of the lymph nodes in regards to cleaning?
Definition
remove cellular debris and microorganisms from lymph
Term
What is the function of the lymph nodes in regards to the immune system?
Definition
Serve as a staging area for B- and T- lymphocytes against invading microorganisms
Term
Where does the lympahtic system not run?
Definition
central nervous system and bones
Term
What does teh lymphatic system ran parallel to?
Definition
blood vessels of teh cardiovascular system
Term
What would happen without the lymphatic system?
Definition
fluid would accumulate in the tissue of the body causing edema, depriving cardiovascular system of sufficient blood volume to operate properly
Term
What is different between the lymphatic system and the cardiovascular system?
Definition
Cardiovascular system is two-way (arteries and veins), lymphatic is one way (blind-ended capillaries)
Term
What happens as fluid accumulates in the tissue? Step 1
Definition
Extracellular fluid pressure rises, gaps open between the squamous epithelial cells of the lymphatic capillaries
Term
What happens as fluid accumulates in the tissue? Step 2
Definition
Lymphatic capillaries carry fluid to larger lymphatic vessels
Term
What happens as fluid accumulates in the tissue? Step 3
Definition
Large vessels merge to form still larger vessels and continue to carry collected fluid
Term
What happens as fluid accumulates in the tissue? Step 4
Definition
Network of vessels culminates in two large vessels
Term
What happens as fluid accumulates in the tissue? Step 5
Definition
THoracic duct and right lymphatic duct deliver the lymph to the left and right subclavian veins
Term
What are the two large vessels the lymphatic network culminate into?
Definition
Thoracic duct and right lymphatic duct
Term
What is the cleaning function of lymph nodes?
Definition
To filter lymph
Term
What is primarily responsible for the filtering of lymph in the lymph nodes?
Definition
macrophages
Term
Where are macrophages found?
Definition
In sinuses found in the lymph nodes
Term
What is the immune system function of the lymph nodes?
Definition
Storage and proliferation sites for B and T lymphocytes
Term
What are the most important players in the adaptive (specific) immune defenses?
Definition
B and T lymphocytes
Term
How are the macrophages and lymphocytes related?
Definition
After macrophages have engulfed a microorganism, they "present" themselves to lymphocytes, resulting in destruction/disabling of microorganism
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