Histo (04.13) Lymphatic System Flashcards
(43 cards)
the lymphatic system is composed of what 7 things?
- diffuse lymphatic tissue
- lymphatic nodules
- lymph nodes
- spleen
- bone marrow
- thymus
- lymphatic vessels
what are the three major functions of the lymphatic system
- drain excess interstitial fluid
- immune response
- provide alternative transportation route for hormones, nutrients, and waste
the lymphatic system drains excess interstitial fluid to return to ___ ___ to help maintain normal blood ____
- blood stream
- volume
the immune response of the lymphatic system is to produce, maintain, and distribute ____
lymphocytes
what are the three types of lymphocytes?
- b cells
- t cells
- natural killer cells
type of lymphocytes that first recognized in the bursa of fabricius in birds; produce and secrete antibodies along with their derivative cell (plasma cell); involved with humoral immunity
B cells
B cells are ___-____% of circulating lymphocytes
20-30
type of lymphocytes that differentiate in the thymus; attach and destroy cells; involved with cell-mediated immunity;
T cells
T cells are ___-___% of circulating hormones
60-80
type of lymphocytes that kill certain transformed cells
natural killer cells
natural killer cells are ____ - ____% of circulating hormones
5-10
list the other supporting cells involved with the lymphatic system
- reticular cells
- monocytes
- macrophages
- neutrophils
- basophils
- eosinophils
- dendritic cells
- follicular cells
- langerhan cells
- epithelioreticular cells
once interstitial fluid is inside the lymphatic capillaries it is now called ____
lymph
when fluid is not drained in the lymphatic system due to blockage it is known as ____
adema
largest lymphatic duct is the ____ ___
thoracic duct
DIFFUSE and lymphatic tissue and LYMPHATIC NODULES are accumulations of lymphocytes in the ___ ___ of the alimentary canal, as well as _____,____, and ____ tracts
- lamina propria
- respiratory
- urinary
- reproductive
the DIFFUSE lymphatic tissue and LYMPHATIC NODULES have no ___ ____
surrounding capsule
lymphatic nodules are sharply defined and are a meshwork of ____ ____
reticular fibers
what are the two types of lymphatic nodules?
- primary nodule
- secondary nodule
lymphatic nodule that is the aggregation of primarily small lymphocytes
primary nodule
lymphatic nodule that will have a germinal center and a mantle zone
secondary nodules
in secondary nodules, ____ ___ ____ are present in germinal centers
follicular dendritic cells
normally, lymphatic nodules are found ____ ____ and by themselves, however, in certain locations of the alimentary canal, they are ___ ____
- randomly dispersed
- grouped together
AGGREGATED lymphatic nodules that create a ring around entrance to the oropharynx and the nasopharynx
tonsils
