Lymphatics Flashcards
What type of lymphocytes are found in the cortex
b cell
What type of lymphocytes are found in the medulla
b cell
What type of lymphocytes are found in the paracortex
t cell
What does lymph look like?
Clear, white water like fluid
What is lymph made of?
WBC and chyle
Define lymph
The fluid that circulates the lymphatic system
How is lymph formed?
Blood exchanges nutrients and waste products from the bloodstream to tissues through interstitial fluid. As substances are added and taken away from the interstitial fluid, its composition changes. Interstitial fluid is formed at the arterial end of capillaries. Most of it is returned to the venous capillaries and venules, but 10% enters lymph capillaries as lymph
What is the function of lymph?
To return proteins and excess interstitial fluid to the blood. Also to pick up bacteria and carry to the lymph nodes to be detroyed
Where in the body are lymph nodes most densely distributed?
Centre of the body - neck, armpits and intestines
What type of vessels take lymph into lymph nodes?
Afferent vessels
What type of vessels take lymph out of lymph nodes?
Efferent vessel
Define lymphoedema
Impaired flow of lymphatic system
Name some symptoms of lymphoedema
Swelling, less flexibility
Name some causes of lymphoedema
Removal of a lymph node, injury to lymph node
Describe the flow of lymph through the lymphatic system
l. capilarry
l. vessel (collecting vessel)
l. node
l. trunk
l. ducts (right duct and thoracic duct)
left and right subclavian veins
