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.
Helium filled latex balloons only float for a couple of days because the Helium is constantly escaping through the walls of the balloon. Latex balloons are made of natural rubber. When natural rubber is formed into a latex balloon, the walls of the balloon inevitably have small microscopic pores or holes. Although these holes are too small to be seen by the human eye, they are about 1000 times larger than an extremely small Helium atom.