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.
The human body, what an amazing design! The body is home to several systems and organs that bear the burden of removing toxins. Speaking from a purely physical detoxification point of view, here are the ways the body does it: 1) Liver and Kidneys-these organs are detox work horses. By keeping them functioning at an optimal level, you give your body a real boost in terms of keeping toxins at bay. Among its many roles, the liver is a blood filter.