Answer:
electrocardiograph
Explanation:
Electrocardiograph -
It refers to the method of producing an electrocardiogram , where the electrical activity of heart is recorded by plotting the graph of voltage versus time , is referred to as an electrocardiograph .
The device consists of electrodes that are placed on the skin to detect the activity of heart .
The electrocardiograph detects the very minute signals which is responsible to pump the blood .
Hence , from the given scenario of the question ,
The correct answer is electrocardiograph .
