Assistant principals aid the principal in the overall administration of the school. Some assistant principals hold this position for several years to prepare for advancement to principal jobs; others are career assistant principals.n larger school systems, a principal is often assisted by someone known as a vice-principal (Republic of Ireland: deputy principal) or assistant principal.
Causes. Pressure on the bladder during delivery is the main cause of a ruptured bladder, although a weakness in the bladder wall may make it susceptible to a rupture. In older horses, a ruptured bladder may be caused by an accident or related to a urinary obstruction.
The main causes of a ruptured bowel are as follows: 1  A blockage of the intestine; 2  Sufferers of Crohns disease may be more likely to develop a ruptured bowel; 3  Trauma to the bowel can lead to rupture/perforation; and.