Lecture 23. Lymphatic system Flashcards
What composes of the lymphatic system
lymph
lymphatic vessels
lymphatic organs
What are the lymphatic organs
red bone marrow thymus lymph nodes tonsils spleen
What are the functions of the lymphatic system?
- drains excess interstitial fluid
- transports dietary lipids
- filters the ymph blood
- carries out immunological response
What are MALTS in the digestive system called?
peyer’s patches
content of lymph
15% interstitial fluid cell debris dead cells chylomicrons lymphocites
What are lymph ducts and lymph trunks
lymph trunks: medium size lymphatic vessels
lymphatic ducts: large size lymphatic vessels
name major lymph nodes
cervical, axillary, lumbar and inguinal lymph nodes
What is the function of afferent lymphatic vessels
bring lymph into the lymph nodes
What is the function of the lymph nodes
filters the lymph
Where are efferent vessels of the lymph nodes found
found on cancave surface of the lymph nodes, also known as hilum of lymph nodes
Where are the afferent vessels of the lymph nodes found
found on the convex surface of the lymph nodes
What divides the lymph nodes into smaller segments
trabeculae
What can you find mostly in the lymphoid follicles
B cells.
what is the function of the sinus
it provides channels for the lymph entering the lymph nodes which presents the antigens to the B cells.
How many lobes does the sinus have
2 lobes, found in both superior and anterior mediastinum
What is the function of the thymus
T-cell education, allows T cells to be activated and become mature
What takes over the function of the thymus
bone marrow, and
What are the 2 organs that have the same size as your fist
heart and spleen
What abdominal area is the spleen located
left hypochondriac region
what are the 2 surfaces of the spleen
medial surface ( visceral surface) lateral surface (diaphragmatic surface)
What ribs guard the spleen
ribs 9, 10 , 11
What is the function of the spleen
filters old and damaged RBC from the blood to store platelets
what are the major structures passing through the hilum region of the spleen
splenic vein. artery and splenic lymphatic vessel
What is the part of the pharynx sitting behind the nasal cavity
nasopharynx
What is the part of the pharynx sitting behind the oral cavity
oropharynx
How many tonsils do we have and where are they located
- pharyngeal tonsil : found at the nasopharynx
- palatine tonsil ( a pair): either side of the oropharynx
- linguil tonsils: posterior 1/3 of tongue
Describe the structure of the lymphatic vessels
lymphatic vessel join to form
function of lumbar trunk
collect lymph from abdominal cavity ( posterior abdominal wall - kidney) and pelvic viscera and lower limbs
function of intestional trunk
abdominal viscera lymph is collected
What forms the cisterna chyli
lumbar and intestinal trunk
What drains into the thoraxic duct
left branchiomediatinum and the cisterna chyli
where is the level of the cisterna chyli
T12-L1 `
what drains into the venous system
thoracic duct and right lymphatic duct
What dorms the right lymphatic duct
union of the right subclavian and right jugular trunks
function of the right subclavian trunk
receives lymph from the right upper limb, right half of the thorax
function of the right jugular trunk
receives lymph from the right side of the head and neck
function of the ingunal lymph nodes
empties into the pelvic lymph nodes
function and drainage of the
a. pre-aortic lymph nodes
b. para-aortic lymph nodes
a. pre-aortic lymph nodes: drains lymph from GI tract from liver, pancreas and spleen. drains into the intestinal trunk
b. para-aortic lymph nodes: empties into the cisterna chyli through the lumbar trunks
