yes !
sphincters
Sphincters are in the digestive tract and urinary tract. They act as one-way doors to prevent backflow. So once foodstuffs enter the small intestines, it cannot go backward back into the stomach.
Sphincters prevent material from flowing backwards, like the pyloric sphincter in the stomach.
Sphincters control the opening and closing between certain body cavities. These are typically one direction, to prevent backflow, for example. Other body systems, like the blood vessels and heart, use valves, but valves and sphincters have very similar functions (though with major differences too).
The semilunar valves prevent backflow into the ventricles. The pulmonary semilunar valve prevents backflow in the right ventricle, and the aortic semilunar valve prevents backflow of blood in the left ventricle.
atria
ventricles
Valves prevent the backflow of blood
valves prevent the backflow of blood.
The heart has a series of one-way valves that prevent backflow during contraction. There are a total of four: The AV valves prevent backflow from the ventricles into the atria and semilunar valves prevent backflow from the aortic and pulmonary trunks into the ventricles.
yes, they get it back by pumping blood to the 4 parts of your heart. when you inhale, it makes rich blood when you exhale it takes out poor blood which turns into carbon dioxide.
To prevent backflow of mercury, a check valve can be installed in the pipeline. This valve allows fluid to flow in one direction only. Additionally, proper design and maintenance of the system can prevent backflow by ensuring that there are no leaks or breaks in the pipeline.