ryan- secondary immune system organs & lymphatics

3 roles of lymphatics

collects excess fluid, transports fats, enables immune responses

what pressures contribute to starling forces?

hydrostatic and osmotic/oncotic pressures

what is the starlings principle?

fluid movement between blood and tissues determined by differences in the hydrostatic and osmotic pressures, between plasma in microvessels and the fluid outtside them

what are the components of the lymphatic system?

lymphatics, lymph fluid, lymph nodes

opposing intravascular forces

blood hydrostatic pressures pushes fluid out of the microvessel (generated by the heart)

what is the most abundant protein in blood used to generate colloid osmotic forces?

albumin

T/F: each layer of tissue has its own pressures

true

how does lymph move?

skeletal muscle movement (increases pressure outside the vessel, valves close, lymph moves forward), smooth muscle cells contract along the lymphatic vessel

describe the direction of movement of lymph

only forward (one way)

list the cellular and acellular components of lymph

fluid (leaked from vessels), immune cells (APCs), molecules (small or large)

do lymphatics move from large to small or small to large vessels?

smaller to larger lymphatic vessels

do larger or smaller lymph vessels contain smooth muscle?

larger (to help contract and move fluid along)

how does lymph return to the bloodstream?

draining into the left and right subclavian vein

describe the pathway of lymphatic fluid originating from the hind limb

fluid collects from distal limb, brought up past the GI tract, filtered through cysterna chyli, travels through thoracic duct, left subclavian vein

describe the pathway of lymphatic fluid originating from the GI tract

lymph fluid is collected from lumbar lymphatics, moves through the cisterna chyli, continues up through the thoracic duct, joins left subclavian vein

describe the pathway of lymphatic fluid originating from the right thoracic limb

travels up the right thoracic limb and into right subclavian vein