If you're constantly battling colds, your spleen could be the hidden reason. Discover how this organ affects your immune defenses.

Your spleen might not get the glory of organs like your heart or brain, but its contributions to your immune system are ...

Don't worry about it. Check this out. The spleen's that soft, purple organ located right behind the stomach and under the lungs. It's about five inches wide and weighs about six ounces.

The spleen contains many blood vessels since one of its primary functions is filtering blood. Injury to the spleen can damage these blood vessels and cause significant bleeding that leaks into the ...