Oophorectomy

Oophorectomy is the surgical removal of the ovaries of a female animal. In the case of non-human animals, this is also called spaying. It is a form of sterilization.

The removal of the ovaries together with the Fallopian tubes is called salpingo-oophorectomy. Oophorectomy and salpingo-oophorectomy are not common forms of birth control in humans; more usual is tubal ligation, in which the Fallopian tubes are blocked but the ovaries remain intact.

In humans, oophorectomy is most usually performed together with a hysterectomy - the removal of the uterus. Its use in a hysterectomy when there are no other health problems is somewhat controversial.

In animals, spaying involves an invasive removal of the ovaries, but rarely has major complications; the superstition that it causes weight gain is not based on fact. Spaying is especially important for certain animals that require the ovum to be released at a certain interval (called estrus or "heat"), such as cats and dogs. If the cell is not released during these animal's heat, it can cause severe medical problems that can be averted by spaying or partnering the animal with a male.

Oophorectomy is sometimes referred to as castration, but that term is most often used to mean the removal of a male animal's testicles.

See also


Tri-State Tornado

The Tri-State Tornado of March 18, 1925, was the deadliest tornado in United States history. More people would die, more schools would be destroyed, more farmers and students would be killed, and the most deaths would occur in one U.S. city from a tornado in history.

The storm kept the same heading, NE 63 degrees for 183 of the 219-mile path. The tornado traveled at an average speed of 62 mph. Records would be set for speed and path length.

The storm began in Ellington, Missouri at 1:01 P.M., then killed a farmer. The tornado may have been a double tornado or accompanied by downbursts as it moved into Annapolis and Leadanna. Two people were killed, 75 were injured and damage totaled more than $500,000 in both towns.

Double tornadoes were sighted near Biehle. After the tornado passed the Ozarks and into Illinois, the storm was at its worst. In Gorham, 34 were killed as nearly 100% of the town was destroyed. Between Gorham and Murphysboro, the fastest ground speed record was broken as the tornado raked across the ground at 73 mph!

The tornado arrived at Murphysboro, Illinois at 2:34 P.M. The tornado passed through quickly and killed a staggering 234 people, breaking yet another record, the most deaths in one U.S. city from a tornado. Damage in Murphysboro exceeded $10 million. Sixty-nine were killed near Desoto, thirty-three at the school was the worst in U.S. history. Another 127 were killed in Hamilton and White counties in Illinois.

Seventy-one were killed in Indiana. Griffin and Owensville were devestated. The tornado finally dissipated 10 miles northeast of Princeton.

The Tri-State Tornado was also a part of a tornado outbreak which included eight tornadoes that killed a total of 747 people, making it, to date, the deadliest tornado outbreak on record.

The Aftermath

To the people that lived in eastern Missouri, southern Illinois, and southwest Indiana, the devastation and damage in the days following the Tri-State Tornado must have been horrendous. Looting was even reported (such as taking rings off of the deceased), but amidst all the deaths, injuries, and destruction, it was now time to clean up the destruction that nature left behind. It would take months to rebuild what was destroyed in 3 1/2 hours.

The Tri-State Tornado killed 695 and injured so many more primarily because the people had no warning and no time to take cover. Few effective warning systems were possible until the early 1980s. Today, radar observations and other technologies have given Americans a national average of 20 minutes warning time.

Was the Tri-State tornado really ONE tornado?

According to data obtained by the National Weather Service both now and in 1925, probably not. Findings from current weather records suggest that a tornado that lasts as long as the Tri-State tornado was probably spawned from a cylical supercell. A cylical supercell is a supercell thunderstorm that continuously evolves and the decay of one supercell leads to the formation of another. So we can pretty much say that the Tri-State tornado was probably much like the Glazier-Higgins-Woodward Tornadoes that would occur 22 years later in 1947: A family of tornadoes.

If technology was as evolved in 1925 as it is now, March 18 would have obviously been the biggest day of severe weather of the year. From what we now know about tornado development, these are the ingredients that formed the deadliest tornado in U.S. history.

See also: List of tornadoes and tornado outbreaks

External links



Last updated: 02-05-2005 10:00:26