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.
Hematuria is often one of many conditions created by a traumatic injury to the urinary tract, which includes the adrenal glands, kidneys, ureters, bladder, prostate gland and urethra. A sharp blow to the kidneys, for example, can cause blood to enter the bladder. One of the most common causes is kidney disease.