- Joined
- Dec 25, 2010
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Hello all,
I know that when you consider the total cross-sectional area of different types of blood vessels, capillaries are said to have a lower velocity of blood moving through them than arteries. Got it.
But directly after a graph depicting the above, Examkrackers has a graph showing pressure being extremely low in capillaries, lower than arteries. I assume that this is now considering the individual capillary and not the total pressure in all capillaries in aggregate? Otherwise, from a physics standpoint, it doesn't make sense to me, since by Poiseulle's Law pressure and velocity are inversely related.
Just want to confirm my suspicion that they changed the reference point from all capillaries in aggregate for the velocity graph to a single capillary for the pressure graph without informing the reader. It seems like if you consider all the capillaries, together, they would have a lower velocity and a higher pressure than the arteries, but an individual capillary has a higher velocity and lower pressure than an individual artery. Right?
Thanks in advance!
I know that when you consider the total cross-sectional area of different types of blood vessels, capillaries are said to have a lower velocity of blood moving through them than arteries. Got it.
But directly after a graph depicting the above, Examkrackers has a graph showing pressure being extremely low in capillaries, lower than arteries. I assume that this is now considering the individual capillary and not the total pressure in all capillaries in aggregate? Otherwise, from a physics standpoint, it doesn't make sense to me, since by Poiseulle's Law pressure and velocity are inversely related.
Just want to confirm my suspicion that they changed the reference point from all capillaries in aggregate for the velocity graph to a single capillary for the pressure graph without informing the reader. It seems like if you consider all the capillaries, together, they would have a lower velocity and a higher pressure than the arteries, but an individual capillary has a higher velocity and lower pressure than an individual artery. Right?
Thanks in advance!