> Certainly this is true.
> But I have to believe that maintaining a head
> pressure on capillaries in a living system will
> move blood. Your observation is insightful and
> there is some possibility that there is another
> force propelling blood through capillaries. Cells
> do go surprisingly fast (about 3x their diameter/
> sec). My specific knowledge here is pretty
> limited and I'm not sure how much modern science
> knows about it either.
> > Energy required to transport blood this
> > if it could happen, would be massive. Thus, we
> > hold our human bodies are part of a large-scale
> > cosmic structure that has an abundant, yet
> > unknown, source of energy.
> We burn a lot of calories to operate this system.
> (remember food calories are 1000x) The caloric
> consumption of the heart and lungs can be
> estimated pretty closely but I believe these
> consume most of our energy when at rest. Anything
> left over might well be wholly or partly
> responsible for aiding these organs. Of course
> there is inefficiency as well.
You may already be somewhat familiar with biophysics and biomechanics but there is extensive research in these areas.
Biological fluid mechanics, or biofluid mechanics, is the study of both gas and liquid fluid flows in or around biological organisms. An often studied liquid biofluid problem is that of blood flow in the human cardiovascular system. Under certain mathematical circumstances, blood flow can be modeled by the Navier–Stokes equations. In vivo whole blood is assumed to be an incompressible Newtonian fluid. However, this assumption fails when considering forward flow within arterioles. At the microscopic scale, the effects of individual red blood cells become significant, and whole blood can no longer be modeled as a continuum. When the diameter of the blood vessel is just slightly larger than the diameter of the red blood cell the Fahraeus–Lindquist effect occurs and there is a decrease in wall shear stress. However, as the diameter of the blood vessel decreases further, the red blood cells have to squeeze through the vessel and often can only pass in a single file. In this case, the inverse Fahraeus–Lindquist effect occurs and the wall shear stress increases.
An example of a gaseous biofluids problem is that of human respiration. Recently, respiratory systems in insects have been studied for bioinspiration for designing improved microfluidic devices.
I think the fact that exercise greatly reduces blood pressure in some instances is instructive. There seem to be many things in nature that are virtually impossible but occur anyway. Whether this is one of them or not is difficult for me to address. In any case your point is well taken. The fact that blood can't be modeled as a newtonian fluid at this level certainly implies there is more going on than is known.
Edited 1 time(s). Last edit at 09-Feb-20 17:16 by cladking.