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venous return - starlings law - Coggle Diagram
venous return - starlings law
stroke volume (amount of blood leaving heart per contraction through left ventricle) = venous return (amount of blood entering heart via right atrium)
super vena cava returns blood to heart via gravity
veins
smooth muscle vein
pulsing
as vase motor tone increase the vain walls squeeze in
as vase motor tone decreases the vain walls relax out
increases blood pressure as lumen size is reduced
pocket valves
as blood is pushed upwards and systole decreases the valve shuts preventing blood back flow
skeletal muscle pump
veins run through skeletal muscles
as muscles shorten and contract blood in the veins between two muscles is constricted leading to less blood flow
active recovery maintains pressure through veins which helps them contract to force blood back to the heart
respiratory pump
blood is squeezed through veins in the thoracic cavity (chest) & moves around from inspiration and expiration, it changes blood pressure from respiratory muscles contracting constantly making it able to increase pressure and squeeze blood back to the heart
the heart suction pump
heart is going through systole/diastole
as the heart goes through diastole it sucks all remaining blood in increasing blood flow