Ascites refers to abnormal accumulation fluid in the abdominal (peritoneal) cavity. The most common cause of ascites is cirrhosis of the liver. Treatment of ascites depends on its underlying cause.
Ecosystem. A functional system that includes an ecological community of organisms together with the physical environment, interacting as a unit. Ecosystems are characterized by flow of energy through food webs, production and degradation of organic matter, and transformation and cycling of nutrient elements.
An ecosystem is a collection of communities of both living and non-living things that are interrelated. While many ecosystems exist on land and in the waters of the world, terrestrial ecosystems are those that are found only on land.