Lymphatics Flashcards
what does the lymphatic compromise off
- small thin walled veins
how does the lymph move
by contraction of skeletal muscles and pulse action of nearby arteries
what is the many functions of the lymphatic system
- balances the excess tissue fluid from within the capillary bed
- within the system are lymph nodes which make immune cells that help the body fight infection
- they also filter the lymph fluid and remove foreign material such as bacteria and cancer cells
what is lymph
excess tissue fluid
- it is formed by the interstitial fluid/extracellular fluid that bathes tissues near capillary beds
how does the lymph form
blood transported to tissues and via arteries and arterioles and leaves the capillary bed in venues and veins
- two pressure are involved in the movement of proteins this is the hydrostatic pressure and colloid osmotic pressure
- hydrostatic pressure forces fluid out of arterioles and is generated by the heart
- colloid osmotic pressure is the pressure exerted by proteins that pull water into that comapremtn
large protein molecules cannot easily cross capillary membranes and thus the majority stay within the interstitial fluid
- in the venues the osmotic pressure exceeds the hydrostatic pressure and this causes a net movement of fluid into the interstitial fluid and this fluid helps form lymph
do lymph nodes form plexuses throughout capillary beds
true
what do the mini valves of the lymphatic capillaries allow through
they allow debris, cells and bacteria to enter the lymphatics
where are the lymph nodes and what type of vessels do they have
they are located along the lymph vessels and have afferent valves
where does the thoracic duct join the venues system
at the anastomoses of the left internal jugular and the left subclavian vein
where do the abdominal and lumbar lymph drain into
the cistern chill which is the origin of the thoracic duct
