Intro to the Lymphatic System Flashcards
Lymphatic system is sparse in ___________
muscle, bone, and fascia
What regions does the right lymphatic duct take up?
Right side of head, neck, & torso
What regions does the thoracic duct take up?
both legs, left arm, left torso, left neck, left side of head
What vessels do the lymphatic ducts drain into?
left/right subclavian veins
Which lymphatic duct begins in the abdomen?
Thoracic duct
Order of lymphatic vessels
Lymphatic capillaries - collecting vessels (pass through lymph nodes) - lymphatic trunks - 2 collecting ducts - subclavian veins
What influences lymph flow?
smooth muscle in walls of lymphatic vessels
compression when between muscles
negative pressure in throrax due to rerpiratory movements
arterial pulsations
gravity
What are lacteals?
special lympatic vessels in the intestinal villi
What do lacteals absorb?
fats and fat-soluble vitamins
What is chyle?
lymph high in fat in lacteals - looks “milky”
How is the lymphatic cycle part of the immune response?
brings foreign particles, microbes, and endogenous cells to lymph nodes
What are the 2 layers of lymph nodes?
cortex (outside) and medulla (inside)
Lymph node’s role in immune response
activate adaptive immune response
Filter lymph
How is lymph different from plasma?
location and lower protein concentration
When do lymphatic capillaries open?
when interstitial osmotic pressure is higher than inside the lymphatic capillary
How do lymphatic vessels stay in place?
anchoring filaments
What’s a lymphangion?
space between 2 valves
How are lymphatic vessels formed?
capillaries that merged
What’s the function of the spleen?
filter blood
What’s the function of Peyer’s patches and the appendix?
filter in the intestines
Function of adenoids and tonsels
filters in the respiratory system
Red pulp of the spleen - why is it red and what does it do?
red due to all the RBCs
removes old and damaged RBCs from circulation
White pulp of the spleen - why is it white and what does it do?
white due to high concentration of lymphocytes
clears antigens from blood
Function of lymphatic SYSTEM
produce, mature, store, and recirculate lymphocytes
store phagocytes
