Rebecca, I do appreciate your posts and discussing this important issue. I will again attempt to address your questions but I am rather pressed for time so I will need to keep it short.
Good, I think we’re getting somewhere. As I’m also a little pressed for time, let’s cut straight to the chase. You asked some questions:
… please tell me if there are 128,000 klms of capillaries – that the diameter of those capillaries is 8 microns, and that blood needs to go through all of it. If the answers to the above is yes – then that system is not sourcing the energy needed solely from the heart.
Yes, if laid end to end, the capillaries would add up to about 128,000 km. Yes, the average diameter is 5-10 microns. However, they are not laid end to end, as you have already admitted. And as I have already said, they form a fine mesh in the capillary bed, not 10 billion separate little pipes coming off the arteries. Think of individual capillaries as short interconnected corridors in an incredibly complex maze, the capillary bed, which can be closed off by the precapillary sphincters. In fact, the sphincters are closed by default – they have to be told to open up.
And this brings us to the most important point: blood does go through all the capillaries at some point, but not all at the same time. Only about 20% of the blood supply is in the arterial system at any given moment, under pressure from the heart, and only about a third of that is in the capillaries. Also, as I said, only about 5-10% of the capillaries are open for business at any one time. The majority of the blood supply, about 64%, is actually in the venous system, a low-pressure system which relies on other factors to keep the blood flowing back to the heart, including venoconstriction.
So the short answer to your question is NO. The heart is not pushing blood through 128,000 km of teeny tubes, and it is not the only internal mechanism that serves to keep the blood flowing. No extra source of cosmic energy is required.
In case you want more detail about how the system works, I’ve sought out a couple of excellent explanations for you to look at:
To be honest, Robert, with all due respect, if you’ve spent twenty years researching your hypothesis, you could have spent a few hours researching how the circulatory system works.
Edited 2 time(s). Last edit at 12-Feb-20 15:21 by Rebecca Bradley.