Week 7 Lymph Part 4 Flashcards
What is the center or inner portion of a lymph node called?
Medulla
What is the most superficial or outer layer of the node called?
cortex
Explain the layers of the lymph node? (superficial to deep)
Mature exterior, immature interior, superficial cortex, deep cortex, medulla
Lymphocytes are highly migratory or not?
VERY migratory
What are the two compartments of a lymph node?
Cortex and medulla
The cortex is comprised of a dense mass of lymphatic tissue such as?
Reticular framework, dendritic cells, lymphocytes, macrophages, plasma cells
Where do blood vessels enter and leave the lymph node?
Through the hilum INTO the medulla
The medulla consists of _____ of lymphatic tissue
Cords
The medulla consists of ‘cords’ of lymphatic tissue separated by?
Lymphatic sinuses or medullary sinuses
Lymphatic sinuses or medullary sinuses
Lymphocytes, macrophages, dendritic cells, and plasma cells
Cords in the lymph node are organized around _______ fibers?
Reticular, they are NOT physically attached -loosely surrounded
The medullary sinuses converge at the _____ and drain into _______ lymphatic vessels?
Converge at the HILUM and drain into the EFFERENT lymphatic vessels
Lymphatic vessels are lined by?
Cuboidal or columnar endothelial cells that allow for lymphocytes to move
What does aquaporin 1 do?
It is a water channel. Helps maintain volume of lymph fluid. Allows transfer of fluid into the bloodstream and causes lymph to enter through afferent vessels to be drawn deep into cortex
What is the thymus??
A bi-lobed organ located in the superior mediastinum, anterior to the heart and great vessels
