Among the countries currently classified by the United Nations as more developed (with a total population of 1.2 billion in 2005), the overall median age rose from 28 in 1950 to 40 in 2010, and is forecast to rise to 44 by 2050.
Generally, human stomachs have a volume about one liter, which is a little more than one quart. Since the stomach has the ability to expand, it can hold much more food.The human stomach can be distended up to four liters, which is more than one gallon. Imagine your stomach to be an empty one-gallon milk carton.There is plenty room for food!hese muscles expand and contract depending on how much food is in the stomach. This contraction is a form of mechanical breakdown of the food. The purpose of this breakdown is to increase the available surface area for the chemicals to act on it.
From the pyloric portion of the stomach, a small muscular valve, the pyloric sphincter, opens into the small intestine. The small intestine, composed of three segments, is about 1 to 1 inches in diameter and approximately 20 feet long (of course this varies with age and with the state of muscular contraction or relaxation).