Lymphoid tissues Flashcards
thin vessel lined by endothelium
lymph vessel
similar to large veins
lymphatic ducts
rich neutral network
tunica adventitia
longitudinal and circular muscle
tunica media
fixed cells predominate
loose lymphoid tissue
free cells predominate
dense lymphoid tissue
found in all lymphoid tissue excepth thymus
nodular lymphoid tissue
lymphocytes and free macrophage
mobile cells
res cells, fix macrophages, plasma cells
fixed cells
2 primary lymphoid organs
bone marrow and thymus
secondary lymphoid organs
tonsil, lymph nodes, balt and malt
highly cellular, viscuous
bone marrow
connective tissue cells of any organ
stroma
consisting mainly of hematopoietic tissue
red marrow (medulla ossium rubra)
consisiting mainly of fat cells
yellow marrow (medulla osium flava)
Red bone marrow produces all red blood cells and platelets and around _________ % of lymphocytes in human adults.
60-70
at birth, what color is a bone marrow?
red
where is yellow marrow found?
medullary cavity of long bones
it produces hormone and thymosin
thymus
where is thymus larger? adults or children?
children
they are large non-encapsulated masses of lymphoid tissue
tonsils
located in the lateral wall of the oropharynx
palatine tonsils
situtated in the lamina propria at the root of the tongue
lingual tonsils
located in the upper posterior part of the throat
pharyngeal tonsils
they are also called as pharyngeal tonsils
adenoids
a small bean-shaped structure that is a part of the body’s immune system
lymph nodules
it acts as the “drainage” points in the lymphatic system
lymph nodules
it is a complex filter
spleen
this organ is well suited for removing poorly opsonised
spleen
location of spleen
mesentery and abdominal activity
nerves and arteries carried into the splenic pulp by ____________
trabeculae
lymph cells directly around artery
t cells
lymphoid nodules
b cells
initiates ummune responses to specific antigens
MALT
meaning of malt
mucosa-associated lymphoid tissue
it consists small accumulations of lymphoid cells or one to a few lymph follicles
malt
plays a role in regulating mucosal immunity
malt
meaning of galt
gut-associated lymphoid tissue
meaning of balt
bronchus-associated lymphoid tissue
tertiary lymphoid structure
balt
it is where peyer’s patches are found
galt
effective priming site of the mucosal and systemic immune responses
balt
meaning of nalt
nasal-associated lymphoid tissue