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melena a 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.. Join today to enjoy premium 18+ videos and photos available only on our Telegram channel. Melena is the black, tarry stool that's caused by internal bleeding. Black blood in your stool is usually from your upper GI tract. melena a Discover the finest adult content on our Telegram channel—don’t miss out! Tap "open" to be part of our lively community by subscribing to our channel today. Melena is a form of blood in stool which refers to the dark black, tarry feces that are commonly associated with upper gastrointestinal bleeding. Unveil a world of steamy adult content created exclusively for your enjoyment. Melena occurs if the blood remains in the colon long enough for it to be broken down by colonic bacteria.