Lymph Basics
What fluid becomes lymph once it enters lymphatic vessels?
Interstitial Fluid
What are the smallest lymphatic vessels called?
Lymphatic Capillaries
What is the largest lymphoid organ?
Spleen
What are the two main types of lymphocytes?
B-Lymphocytes and T-Lymphocytes
What is lymphadenopathy
Swollen lymph nodes
What percentage of interstitial fluid is not reabsorbed into blood capillaries?
15%
What type of muscle contraction helps move lymph through vessels?
Skeletal Muscle
In which organ do T lymphocytes mature?
Thymus
Where are all formed elements of blood produced?
Red Bone Marrow
Enlarged spleen
What types of unwanted materials can lymph transport?
Pathogens, cell debris, cancer cells
Which lymphatic trunk drains the lower limbs?
Lumbar Trunk
What region of the spleen is responsible for immune function?
White Pulp
What general type of lymphoid structures initiate immune responses?
Secondary lymphoid structures
Why is a ruptured spleen so dangerous?
The spleen is highly vascular.
What must a lymphoid structure need to do to be classified as a primary structure?
Produce or mature lymphocytes
What is the name of the duct that drains most of the body?
Red blood cells will not be filtered back into the blood from the spleen if they are not...
Flexible
What is the term for immature T cells before they mature in the thymus?
Thymocytes
What condition results from impaired lymph drainage?
Lymphedema
Walk me through the pathway that blood flows through the spleen
Splenic artery, central arteries, red pulp, sinusoid, splenic vein
What specific body regions are NOT drained by the thoracic duct?
Right head/neck, right upper body, right upper limb
Why do lymph nodes have multiple afferent vessels, but only 1-2 efferent vessels?
To increase the time lymph is in the lymph nodes and effectiveness of the lymph nodes.
What are Peyer's Patches?
A type of MALT found in the GI tract.
What causes lymphadenopathy at the cellular level?
Lymphocyte proliferation and fluid accumulation