In reference to Circulatory Systems, what is mmHg?

Question

1) What is mmHg?

2) If someone has a blood pressure of 89/59 mmHg, Is this person healthy* (what do the two numbers mean? )?

* What's the average (aprox.) blood pressure for a HEALTHY human?

Answer 1

mmHg means millimeters of mercury.....89/59 is a low bp..... textbook good bp is 120/80