Lymphatics Flashcards
First lymph vessel is known as ____ and is the smallest. IT is near blood capillaries and is responsible for….
initial lymph vessel
collecting fluid from interstitium that is not picked up by venous system.
Lymphatic system transports _____ _____.
It is responsible for ___-___% of interstitial fluid while venous system does the other percentage.
extracellular proteins
10-20%
Initial lymph vessels transport towards larger lymph vessels known as
lymph collectors
Lymph collectors transport to even larger lymph vessels known as
lymphatic trunks
The two main lymphatic trunks are
R lymphatic duct and thoracic duct
R lymphatic duct drains
R arm and R side of head
Thoracic duct drains
remainder of body
Lymphatic trunks empty lymph directly into
venous system via subclavian veins
Lymphatic system is under control of
autonomic nervous system
Other components of lymphatic system include
thymus
bone marrow
spleen
tonsils
Peyer patches in the small intestine
Lymphedema is
chronic and incurable
Primary lymphedema
occurs due to abnormal development of lymphatic system
Secondary lymphedema
occurs as a result of some other disease or injury that causes damage to lymphatics
Three types of lymph insufficiencies
dynamic
mechanical
combined
Dynamic insufficiency
most common
occurs when there is excess lymph circulating that exceeds the transport capacity
pitting edema
Examples: venous insufficiency, CHF, pregnancy
Mechanical insufficiency
occurs when transport capacity is reduced due to damage to the lymph system
results in more protein rich lymphedema
non-pitting
Combined insufficiency
both increase in lymph fluid and decrease in transport capacity
Individuals at greater risk for lymphedema
lymph node removal
extensive chest surgeries
radiation therapy
obesity