If the scientists working on the problem appreciated the need to circulate blood, there was simply no effective means to do so.

In medicine, Lazarus is the patient who, believed dead, spontaneously starts to circulate blood.

The force exerted by circulating blood on the walls of blood vessels.

These are affected by venous tone and volume of circulating blood.

And the face turns ghastly white because the heart does not circulate much blood there.

The spleen may be used to remove ice crystals from circulating blood.

Compressed air oscillates the ventricles, circulating blood around the body.

The smaller, right side of the heart generates the lower pressure required to circulate blood to the lungs.

This requires the heart to work harder than normal to circulate blood through the blood vessels.

The heart basically acts as a pump which circulates blood throughout our body.