What is vomitus?

Vomitus refers to the material that is expelled from the stomach through the mouth during the process of vomiting. This typically includes food, liquid, and digestive juices that the body rejects due to various reasons, such as illness, irritation, or trauma. Understanding vomitus is important in a clinical setting as it can provide insights into a patient's condition, including signs of potential gastrointestinal issues or underlying health problems.

The other options, while they describe different medical phenomena, do not accurately define vomitus. For example, fluid accumulated in the lungs pertains to pulmonary issues and is referred to as pulmonary edema, not vomitus. Waste products from the liver relate to metabolic processes and can manifest as bile or other substances, rather than being what is expelled during vomiting. Additionally, severe diarrhea refers to the frequent and loose bowel movements, which is unrelated to the act of vomiting.