The black, tarry, foul-smelling FECES that contain degraded blood.
Melenas
D006396
Hematemesis
Vomiting of blood that is either fresh bright red, or older "coffee-ground" in character. It generally indicates bleeding of the UPPER GASTROINTESTINAL TRACT.
Hematemeses
D006471
Gastrointestinal Hemorrhage
Bleeding in any segment of the GASTROINTESTINAL TRACT from ESOPHAGUS to RECTUM.