CK-12 Foundation
Ck 12: Digestive System Diseases
[Free Registration/Login may be required to access all resource tools.] You've probably had an upset stomach. Most likely it was due to something you ate. But imagine bleeding from your stomach. That's a little different than your...
CK-12 Foundation
Ck 12: Biology: Digestive System Diseases
[Free Registration/Login may be required to access all resource tools.] Describes common diseases of the digestive system.