RE: Blood...
October 11, 2014 at 10:23 pm
(This post was last modified: October 11, 2014 at 10:27 pm by HopOnPop.)
The heart is actually only the main pump. In fact there are countless muscles all over the body that assist in circulation. Every artery wall, for instance, has involuntary smooth muscles that constantly squeeze and relax to help the heart to circulate blood outward to the organs and body extremities. The veinous system (return to heart) is the more superficially located web of tubes and largely depends upon your moment to moment voluntary body movements and muscle flexures to aid the passage of blood back. This is why we get the urge to stretch and yawn and fidget in our chairs when we become sedentary for too long.
