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.
Trauma, rupture of blood vessels or bleeding disorders could result in the accumulation of blood in the abdominal cavity. Heart disease, in which there is failure of the right side of the heart, can also cause fluid buildup in the abdomen as the heart loses its capacity to pump blood. This results in a buildup of pressure in the abdominal cavity and causes fluid accumulation as a result of portal hypertension. Liver disease, inflammation of the kidneys or a decrease in the blood albumin levels are other conditions that result in abdominal fluid buildup.