Originally Posted by spasm3
Originally Posted by Farnsworth
Originally Posted by ZeeOSix
Positive displacement pump ...
Don't let it hit "pressure relief".
The heart valves are controlled by electricity, without a wire or battery in sight and the pump is self contained. All that created from a rock circling the sun, but of course that topic is not allowed. Even though it is science.
The heart valves operate solely by pressure. The muscle innervation is bio electric. The valves open by the fluid pressure rise in the chamber as the ventricle contracts from muscle cells depolarizing. The aortic and pulmonic valves close as the pressure in the rv and lv chambers falls off from systole ending. The tricuspid and mitral valves close as the atrial pressure falls. There are papillary muscles and chordae tendineae to limit the travel of the valve leaflets, like rubber bands.
Are you an MD? You say muscle innervation is bio electric. Valve is pressure controlled. OK, I didn't have to put valve, just leave it at heart. Bio or not, it is still electricity. controlling the heart.The reason my heart pumps low is due to the electrical controls. A pacemaker would be the next step, but the doctor is slowing my heart rate down with some low dosages of medicines and it seems to be getting better It was down to 40%. Everything is in great shape, including heart rate and cholesterol, just the electrical controls are not in perfect sync.
That's how I learned the heart muscle is not benefited by exercise directly, but about how cujet aptly explained it.