How does blood use force?

Blood responds to force because blood is a fluid. The forces on it when it is pumped around the circulatory system can be studied and quantified. Medical science is quite good at this. From the point of view of physics, it is a problem in fluid mechanics. It is made more complex by the "irregular" action of the heart as a pump. The heart does not move blood in a continuous, even way. Rather, the heart applies "bursts" of compressive energy to support circulation. And the vessels through which the blood flows have some elastic qualities. Still, the way blood uses force has long been recognized, even though the sophisticated medical view we currently have has only unfolded over the last century or so. As an aside, the "bursts" of energy supplied by the heart are the only way the blood and circulatory system "like to be treated" in their support of life. A pump that does not "beat" but moves the blood in a smooth, continuous way, will not work to support life over a lengthy period. For a short term, like the way blood is mechanically moved by the machines used in operating theaters in support heart surgery, smooth-flowing blood circulation is acceptable, but all artificial hearts must "beat" in a way similar to the natural rhythm of the heart.