Exiting the interstate, joseph saw police lights in his rear view mirror and his heart began to race. joseph moved to the right hand lane and the police officer passed him pursuing another car. his pulse then began to return to normal, due to the action of his nervous system.

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.