A normal PR interval measures 0.12-0.20 seconds which is 3 to 5 small boxes on the EKG strip. When you measure a PR interval, you start measuring at the BEGINNING of the p-wave until the BEGINNING of the QRS complex. Here are some simple steps on how to measure the PR interval: Find the P-wave on the EKG strip. Determine where the PR interval is, and to do this you start measuring at the beginning of the p-wave until the beginning of the QRS complex. Count the SMALL boxes between there measurements. Remember each box represents 0.04 seconds.
The role of the excretory system is to rid the body of toxic waste products. Which of these body systems also plays a direct role in removing waste products from the body? A) endocrine B) nervous C) respiratory D) skeletal.
You can expel toxins in your sweat. Your kidneys filter your blood and expel toxins and waste in your urine. And your colon takes care of solid waste removal. The colon is actually one of most abused areas of your body because of all the waste it has to take care of. Many toxins and bad bacteria are constantly bombarding your body in this area and your immune system works overtime to keep it all in check. Taking care of your colon can do a lot to detoxify your body.