Anatomy Lymphatic System Flashcards
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Read the first 6 Anatomy Lymphatic System flashcards as text
What structure prevents backflow of lymph in lymphatic vessels?
Answer: One-way valves
Lymphatic vessels contain bicuspid one-way valves that ensure unidirectional lymph flow toward the thoracic duct.
Tonsils are classified as which type of lymphoid organ?
Answer: Secondary lymphoid organs
Tonsils are secondary lymphoid organs that provide immune surveillance at the entrance to the digestive and respiratory tracts.
Infectious mononucleosis classically causes enlargement of which lymph nodes?
Answer: Cervical nodes
Epstein-Barr virus (mononucleosis) classically causes cervical lymphadenopathy — swollen posterior cervical lymph nodes.
What is the primary function of the red pulp of the spleen?
Answer: Filter blood and remove aged red blood cells
The red pulp filters blood through sinusoids and macrophages that phagocytose aged, damaged, or abnormal red blood cells.
Which cells in the subcapsular sinus of lymph nodes phagocytose foreign particles entering with lymph?
Answer: Macrophages
Macrophages lining the subcapsular sinus phagocytose pathogens and foreign particles as lymph enters the node.
Lymph from the intestines that is rich in absorbed dietary fats is called:
Answer: Chyle
Chyle is the milky lymph collected by intestinal lacteals after a fatty meal, containing chylomicrons and absorbed lipids.