Final answer:
Emesis is the term used to describe vomiting blood, which can occur with gastric ulcers, gastritis, esophageal varices, and other conditions.
Step-by-step explanation:
Emesis, or vomiting, is the term used to describe vomiting blood. This can occur with gastric ulcers, gastritis, esophageal varices, and other conditions. When the stomach muscles contract forcefully, it leads to the expulsion of blood through the mouth. The process of emesis is regulated by the medulla.