18: Lymphatic System Flashcards
What is lymph?
Name given to interstitial fluid once it enters the lymphatic system
What lymphatic structure is crucial to the small intestines ability to transport dietary lipids/lipid-soluble vitamins?
Lacteals, lymphatic capillaries in the small intestine
What is chyle?
A milky fluid formed in lacteals by combining dietary triglycerides and other lipids. It eventually enters the bloodstream
What are the 4 lymphatic structures that drain into each other, from smallest to largest?
Lymphatic capillaries, vessels, trunks, and ducts
The lymph from the upper right side of the body drains into the _______ via the __________
Right subclavian vein
right lymphatic duct
Lymph from the body (besides the upper right portion) drains into the _______ via the ________.
Left subclavian vein
Thoracic duct
The thoracis duct begins just beneath the diaphragm in the ______ that receives lymph from the lower abdomen, pelvis, and lower limbs
Cisterna chyli
Within the lymphatic system, what is the bone marrow and thymus gland? Why do they fit this category?
Primary lymphoid (lymphatic) organs
They are organs where lymphocytes proliferate and mature
What does the cortex of the thymus contain?
Large numbers of immature T cells
What does the medulla of the thymus contain?
T cells that are ready to be released into circulation
What are the secondary lymphoid (lymphatic) organs? What do they do?
Lymph nodes and spleen
Organs that store naive lymphocytes
The cortex and medulla of the lymph nodes contain large numbers of macrophages. Why?
Lymph nodes function to remove debris and pathogens from lymph
What is the difference between afferent and efferent lymphatic vessels?
Afferent is TOWARDS a lymph node
Efferent is AWAY from a lymph node
What are the two types of pulp in the spleen?
Red pulp (mostly RBCs)
White pulp (mostly WBCs)
What is the function of lymphoid nodules?
Screen for and attack foreign antigens by mounting the immune response
