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Blood...
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It isn't. But it's also not an analogy for the blood circulatory system, which is.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
 (October 12, 2014 at 4:41 pm)lifesagift Wrote:(October 12, 2014 at 4:40 pm)Stimbo Wrote: I know what crud is. The only waste that blood encounters is carbon dioxide and it releases that through the lungs. If you're talking about fatty deposits, well that's where diseases like arteriosclerosis come in; and the 'design' as it is right now can't cope with that. It's easier than trying to type it all out.
Dying to live, living to die.
 (October 12, 2014 at 5:08 pm)Beccs Wrote:(October 12, 2014 at 4:41 pm)lifesagift Wrote: No, I'm asking how does all of the blood in every extremity get returned to the heart? Wow, thanks, let me go away and digest this, it looks like it may explain my question.. many thanks..  (October 12, 2014 at 5:08 pm)Beccs Wrote:(October 12, 2014 at 4:41 pm)lifesagift Wrote: No, I'm asking how does all of the blood in every extremity get returned to the heart? It's a good thing we have a surgeon around! 
 (October 12, 2014 at 5:58 pm)pocaracas Wrote:(October 12, 2014 at 5:08 pm)Beccs Wrote: It's easier than trying to type it all out. Yeah, cause we don't have an internet, or search engines. 
Skepticism is not a position; it is an approach to claims.
Science is not a subject, but a method. (October 12, 2014 at 6:56 pm)Chas Wrote:(October 12, 2014 at 5:58 pm)pocaracas Wrote: It's a good thing we have a surgeon around! What?!... what are those things? Search... engines?! wtf?! How do you get pistons and the like to search for anything?!
Ok, it's me !! Looking at any image of the veins or arteries in the body looks like a map of a river, but backwards (i.e. from the sea, to smaller rivers and streams etc). But what I didn't realise was this...
"Capillaries connect the ends of the smallest arteries (arterioles) with the beginnings of the smallest veins (venules) to send the blood back to your heart through the veins". Foolish, maybe, but hands up, and problem solved. Thanks for you input people.
Yep, simple as that
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
So if, for example, one of these capillaries is malformed and doesn't join to a venule, then what would happen with blood just constantly pumping into a dead end?
Bear in mind that those capillaries are only around the diameter of a red blood cell. It wouldn't be a major problem; nor a dead end, since other blood vessels would be sufficient to carry the traffic.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
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