Your colon is lined with a layer of mucus. It's wet, it's slimy, and it keeps your stool hydrated enough to, you know, move along. Without it, everything dries out and gets stuck. Researchers at ...

Sea sponges “sneeze” in slow motion to get rid of the sand and pollutants that they suck into their bodies, and the expelled mucus may be an important food source for other marine organisms. Taking up ...

When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow or maybe even brown. We all produce mucus, even when healthy. Mucus is a ...

Mucus, also called phlegm, is the lubricating substance that lines the surface of your lungs, mouth, sinuses, stomach, intestines, and even eyes, according to the National Institutes of Health (NIH).