Picture of The Esophagus

The esophagus runs behind the windpipe (trachea) and heart, and in front of the spine. The upper esophageal sphincter (UES) is a bundle of muscles ...

Mehr lesen

What is a Bilirubin Test?

A bilirubin test measures the amount of bilirubin in your blood. This is the bilirubin created from red blood cell breakdown. This is the bilirubin...

Mehr lesen

What is Obesity?

Obesity means having far too much body fat. If you're one of them, you can work to lose weight. For adults, experts usually define obesity based on...

Mehr lesen