Why the octopus is three hearts and he will survive without one of them?
Octopuses – Amazing Beings. They have blue blood, highly developed nervous system, and they move, using all eight hands (and not legs, as it seems logical from the name of the animal). And at the same time never in them are not confused.
It is difficult to a closed circulatory system, generally uncharacteristic for invertebrates, there are all challenges of mollusks. At the same time, unlike vertebrates, also possess a closed circulatory system, the cephalopions are not one, but three of the hearts . Paired gill (or bronchial) hearts pushed blood through the gills, participating in a small circulation circle. And the central systemic is distributed by oxygen hemolymph across the organism.
Another amazing feature of octopuses is that the work of many organs is managed by individual centers. So it turns out that every hand is controlled by its nervous center, that is, it has a similar brain. The activities of similar nerve centers are managed by the work of hearts.
If you damage the system heart, the octopus will die, because the blood will stop reaching the organs. With gill, everything is more difficult. If one of them is damaged in the laboratory, the animal will survive, the load on the second will increase. In nature – alas, no. But here it is about physical destruction.
Octopus does not die even if the nerve centers of both gill hearts are damaged
In case of damage to the nervous center, managing the work of one of the gill hearts, which can happen, for example, when attacking dolphins, nervous trams are broken, but the octopus is survived. The damaged organ continues to function at the minimum level, and the load on healthy increases. Due to such redistribution, there is an arrhythmia of the system heart.
However, with the lack of one body, everything is more or less clear. People also live without one kidney, for example. But the octopus does not die even if the nerve centers of both gill hearts are damaged! The authorities continue to operate in the mode of minimum load, and if the clang clam will reduce its activity, after a few months, nerve centers will restore.
And the most amazing occurs when violating the activity of the nervous center, managing the system of system heart. It begins to push blood mechanically, shrinking only when the hemolymph is filling. Because of this, the pace of metabolism is reduced, but the octopus again remains to live.