1, 2 It contains all normal layers of the intestinal wall and, in approximately 50 percent of cases, contains tissue from other sites (ectopic tissue). 2 This ectopic, or heterotopic, tissue can often be the cause of complications occurring in Meckel's diverticulum. Meckel's diverticulum occurs in about 2 percent of the population, making it the most prevalent congenital abnormality of the gastrointestinal tract.
A common helium-filled latex balloon lasts from about 12 hours up to two days. However, the size, type of material, and presence of a sealant all affect the balloon's lifespan. The treatment and level of activity to which the balloon is subjected also affects how long it floats.
Like helium, you can fill balloons with xenon, but it is very expensive and the balloon becomes very heavy because the gas is so dense. An average balloon can hold around 40 lbs. (18.1 kilograms) of xenon, according to an experiment by the Royal Society of Chemistry. Xenon atoms added to liquid helium are used to observe quantum tornadoes.