The crossing of the Empty Quarter, the largest continuous peninsula of sand, first happened unbeknownst to the world when Bertram, who was finance minister to Sultan Taimur al Said in 1925, and Sheikh Saleh set off quietly from Salalah, as they were sure they would not be granted permission in the winter of 1930.
Definition. Hematemesis is the vomiting of blood, which may be obviously red or have an appearance similar to coffee grounds. Melena is the passage of black, tarry stools. Hematochezia is the passage of fresh blood per anus, usually in or with stools. Hematemesis is the vomiting of blood, which may be obviously red or have an appearance similar to coffee grounds.
The most common cause of melena is peptic ulcer disease. Any other cause of bleeding from the upper gastrointestinal tract, or even the ascending colon, can also cause melena. Melena may also be a sign of drug overdose if a patient is taking anticoagulants, such as warfarin.