LECTURE 5 lymphatic system Flashcards
functions of lymphatic sytem
to collect excess tissue fluid collecting at arteriole end of capillary beds, and return leaked blood proteins to blood (maintain osmotic pressure needed to take up water into bloodstream)
lymph is moved through vessels
lymph moves cranially with very low pressure, pulse of nearby arteries (helps movement), contraction of surrounding skeletal muscle, regular movement of body, muscle in tunica media
lymph
clear fluid from loose CT at capillaries; contains small molecules of blood plasma, water, various ions, nutrient molecules, respiratory gases
lymphatic capillaries
smallest lymphatic vessels, near blood capillaries
lymph collecting vessels
small, 3 tunics, valves
lymph nodes
sit along collecting vessels, start antibody response, clean lymph of pathogens
lymphatic trunks
convergence large collecting vessels
lymphatic ducts
largest lymphatic vessels, empty into veins of left side of neck
thoracic duct
receives lymph from large trunks in abdomen and thorax; receives lymph from ducts of thoracic lymph nodes; along vertebral bodies; contain valves to ensure one way flow of lymph to lymph nodes; drains into left brachiocephalic vein