No Heart

The medical student was shocked when he received a failing grade in radiology. Approaching the professor, he demanded to know the reason for the grade. 'You know the self X-ray you took?' asked the professor. 'I do.' said the student. 'A fine picture,' the professor said, 'of your lungs, stomach, and liver.' 'If it's a fine picture, then why did you give me an F?' asked the student 'I had no choice,' said the professor. 'You didn't put your heart into it.'"