The human intestines are somewhat similar to these rubber tubes; first, they are flexible, and second, the diameter of each section of the intestines is actually different, some being large and some small. The result of such physiological anatomical characteristics is that rubber tubes easily fold, and if the surface happens to be indented, the smaller-diameter section can directly invert into the larger-diameter cavity like a pen.
The common location for infant intussusception is the end of the ileum inserting into the large diameter of the cecum.
You might find it strange, how can intestines fold? Intestines are living organs with autonomic nerves and can move independently. If an internal infection occurs, or the autonomic nerves are disturbed, or due to external injury, their movement disorder can inevitably result in accidental folds.
Why are infants' intestines particularly prone to folding?
