Lecture 10 Flashcards
where does the lymphatic system originate
the lymphatic system of vessels arise during the early embryonic phase as an outgrowth from the primitive venous system (venous endothelia )
where does the lymphatic system ultimately drain into
venous system
where in body can you find a draining system of lymphatic vessels
All regions of the body possess a draining system of lymphatic vessels (except the brain and spinal cord, cartilage).
what are the functions of the lymphatic system
homeostasis (drain excessive fluid back to the venous system), and defense (immunological response)
what can the lymphatic system do in terms of defence
it Represents a significant immune defensive mechanism of the body: in passage of immunological cells.
But it also spread cancer through the system, and to the venous system
where does interstitial fluid go
absorbed into the blind ended lymph capillaries (deficient in basement membranes ), and passed distally , assisted by oneway valves and also smooth muscle contractions in larger-walld lymphatic vessels.
before birth, what is the function of the lymphatic system
just homeostasis, prenatally is a sterile environment
where does a lymph node develop
where there are many lymph vessels, embryonic cells causes the mesenchymal cells to form a lymph node
what are mesenchymal cells
multipotent cells
does a lymph flow into the lymph node fast or slow
stasis - slow
what does a lymph node contain
lots of dendritic cells and phagocytic cells that phagocytose the particles and break it down
how does the LYMPHATIC VESSELS DRAIN TOWARDS THE VENOUS SYSTEM
thoracic duct begins as an abdominal confluence of large lymph vessels (trunks) from the abdomen, pelvis and lower limbs.
Where does the thoracic duct begin
CISTERNA CHILI
where is the CISTERNA CHILI
L1 and L2
where does the thoracic duct ascend
ascends to the right of the midline between the azygous vein and aorta, crossed the midline
