SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Newly manufactured artificial heart valves. There are four valves in the human heart, all of which prevent the backflow of blood. Damage to the valves can lead to malfunctioning of the heart and death. If a valve cannot be repaired it must be replaced. Photographed at the Planar Corporation factory, Minsk, Belarus, in 2017.
Model release not required. Property release not required.