Week 7 Lymph Part 3 Flashcards
Size of nodules depends on?
1)where/how you cut and 2) current immune response of said person
Collections of lymphatic nodules and diffuse lymphatic tissue are named according to?
The region they reside in (GALT, BALT, MALT)
GALT
Gut-associated lymphatic tissue
BALT
Bronchus-associated lymphatic tissue
MALT
Mucosa-associated lymphatic tissue
What is the next level of organization above lymph nodules or lymphatic follicles?
Lymph nodes
Order of organization: lymph nodules/follicles, lymph nodes, diffuse lymphoid tissue
diffuse lymphoid tissue < lymph nodules/follicles < lymph nodes
What are lymph nodes?
Small bean shaped encapsulated lymphatic organs aobut 1mm-2cm
Are lymph nodules/follicles encapsulated?
NO! Only nodes
Where are lymph nodes found?
Interspersed along the lymphatic vessels
Afferent lymphatic vessels
Convey lymph to the node
Efferent lymphatic vessels
Carry lymph away from the node
**How does lymph nodes get lymph compared to lymph nodules?
Nodules rely on diffusion of interstitial fluid contacting immune cells; lymph nodes are encapsulated and rely on actual lymph movement flowing through vessels and going through node
Afferent verses efferent?
Afferent vessel= toward lymph node; efferent vessel=away from lymph node
What is the capsule of the lymph node?
Dense connective tissue surrounding the node
What projects off the capsule of nodes into the center?
trabeculae
Trabeculae
Dense connective tissue extending from the capsule into center of node forming a rough framework
Trabeculae main anatomical purpose is to?
Divide the lymph node into sections
What mostly makes up the dense connective tissue in capsule/trabeculae?
collagen
reticular tissue
comprised of reticular cells (fibroblasts) and reticular fibers (collagen 3) form the fine meshwork throughout the node
reticular tissue is made of what type of collagen tissue and what type of cell?
Collagen 3 and fibroblasts
