Melena

（重定向自Melana）

In medicine, melena or melæna refers to the black "tarry" feces that are associated with upper gastrointestinal bleeding. The black color is caused by the hemoglobin in the blood being altered by digestive chemicals and intestinal bacteria.

Iron supplements may cause a grayish-black stool that should be distinguished from the black, tarlike stool that occurs from bleeding ulcer.

单词	Melana
释义	Melana 英语百科 Melena （重定向自Melana） In medicine, melena or melæna refers to the black "tarry" feces that are associated with upper gastrointestinal bleeding. The black color is caused by the hemoglobin in the blood being altered by digestive chemicals and intestinal bacteria. Iron supplements may cause a grayish-black stool that should be distinguished from the black, tarlike stool that occurs from bleeding ulcer.
随便看	limited allowable load的意思 limited amino acid value的意思 limited amount的意思 limited and narrow consumption capacity的意思 limited and reduced的意思 limited angle reconstruction的意思 limited angle tomography的意思 Limited angle torque motor的意思 limited annuity的意思 limited aperture problem的意思 limited apparent flow的意思 Limited appearance的意思 limited application的意思 Limited Approach Boundary的意思 limited area的意思 limited area communication的意思 limited area finemesh model的意思 limited area model的意思 limited area system的意思 limited ascii的意思 limited assistance的意思 limited association的意思 limited assurance的意思 limited assurance engagement的意思 Limited atonement的意思