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.
Procedure. 1  Inflate one helium balloon and one Mylar balloon. 2  Put both balloons in a room together. Observe how long it takes for them to lose altitude and drop to the ground, taking measurements each day. 3  Repeat steps 1-3 for three more trails to ensure accuracy.  Record your 1  results. Research the physical properties and history of Mylar and Latex.