Valves. Mitral and aortic.
These are called valves.
The valves that prevent blood from flowing back into the atria are called atrioventricular valves.
The flap of tissue that prevents blood from flowing backward is called a valve. Valves are found in veins and in the heart to ensure that blood flows in one direction and does not pool or backflow.
Viscosity
There are atrioventricular valves on each side of the heart that keep blood from flowing from the ventricles back up into the atria. There are also semilunar valves that prevent blood from flowing from the pulmonary arteries and aorta back into the right and left ventricles, respectively.
The tissue that prevents blood from flowing backward and helps maintain pressure in the ventricles is called the heart valves. Specifically, the atrioventricular (AV) valves and semilunar valves play crucial roles in this process. The AV valves (tricuspid and mitral valves) prevent backflow into the atria, while the semilunar valves (pulmonary and aortic valves) prevent backflow into the ventricles after contraction. This ensures efficient blood flow throughout the heart and body.
The connective tissue that connects muscle to muscle is called fascia.
Backward force is called "retrograde" force.
Tendons
Flowing electricity is called electric current.
The connective tissue surrounding the fascicle of a muscle is the perimysium.
Tendons