Atrial stretching should be answered only by itself. This is exactly how the ventricles behave. They give no signals to anyone. And the atria seemed to warn: get ready, a big load is coming! Excellent proof of the existence of independent nerve nodes! The pressure sensor, hidden in the wall of the atrium, sent a signal to the center, but not the general one, located somewhere in the spinal cord, but its own, cardiac. The signal was received, recorded and converted into an order directed to the ventricle. He immediately intensified his activities. It is logical that an increase in pressure in the ventricle does not affect other parts of the heart. After all, blood from the ventricle is pushed beyond. Here, the Starling effect is enough when a team (also not without the participation of nerves!) Arises and is implemented in the same department. Then why did nature “connect” the heart nodes to the center, if the heart has such a system of self-government? First of all, because the heart must be subject to orders from the center, which coordinates all the work of the body. The intracardiac nerve nodes, says Kositsky, are ready-made control units. They recorded the behavior of the heart for all occasions. And there is absolutely no need for the central nervous system to transmit details along long wires like pulse rate, degree of filling, and so on. Firstly, distortions are possible during transmission, and secondly, why do you need to do “top-level” calculations every time? In addition, a complete loss of communication is possible. The disease spares neither the brain nor the spinal cord. She can do the same as the surgeon’s scalpel. Of course, nature was not guided by these considerations, creating such a reliable heart control system. It was easier. Apparently, at first, in the most ancient organisms, the heart was a simple muscle bag with valves and worked like a rubber - the more blood flowed in, the more was thrown away. Then came the mechanism of intracardiac regulation - nerve nodes with ready-made programs. Such a heart is already more adapted to variable activities. And only at the last stage, in the most highly developed animals, does it obey the common center. Reliability, developed by millions of years of struggle for existence, was backed up by accuracy and speed. So, these girls and couples got paid to have sex on Webcams and it was recorded and now you can see what happens in the private rooms, in these free Webcam Porn Movies.No Registration Required - 100% Free free xxx cams models streaming direct to you from their homes and studios around the world. Sexy webcam online strip shows, sex shows. The girls broadcasting their webcams can make money by relying on free tips sent to them by members.