0 Members and 1 Guest are viewing this topic.
I'd have to say two wouldn't be better because its just one more thing that could go wrong and kill you ha
don't know too much about doctor who, but the easiest logic would be Dr. Beaver's #1, that two hearts pumping in paralell (if you think of the circulatory system like an electrical circuit) means that each heart would have to do half the work an ordinary heat does and thus not wear out as fast. Getting back to the electrical circut analogy, if you have two light bulbs in parralell, they put out as much light as one light bulb in a simple circuit, but they last twice as long as the single light bulb would.
It is not really about having two light bulbs (which is analogous to having two kidneys), but more like having two electrical power sources in parallel. If the two power sources are DC power sources, then it is easy to do, and two are better than one. The problem is that if you have two AC power sources (analogues to a beating heart), then if the two power supplies are not in phase with each other, then you will have massive inefficiencies as the the current travelling between the two power sources absorbs a lot of energy that might otherwise to pumped into the external circuit.
Octopuses have three hearts. Two pump blood through each of the two gills, while the third pumps blood through the body.
QuoteOctopuses have three hearts. Two pump blood through each of the two gills, while the third pumps blood through the body.http://en.wikipedia.org/wiki/Octopus