Leeches
The leech is a segmented worm that in all actuallity has a very vivid
life. From being used by doctors to just being blood-sucking parasites, the
leech is a true wonder of the mind.
The leech has a series of ring-like segments that make up its body
structure. They maybe from 2 to 20 centimeters long and have the ability to
shorten or lengthen their bodies. They mostly come in colors of black, red
or brown, sometimes with stripes or spots. They are extremely sensitive to
touch, temperatue, and drying out. Also, they have clusters of cells on the
front end thatare light-sensative, almost like eyes. Leeches usually live in
dark, damp areas such as the bottoms of lakes, jungels, or shallow streams.
Finally, the leech is a Hermaphrodit, containing bot male and female sexual
reproductive organs.
With a sucker at both ends of it's body, the leech usually lives as a
parasite, feeding upon the blood and tissue of other animals, or on decaying
plant and animal materials. It has a mouth centered on the front sucker with
teeth in some cases. Leeches, that are parasites, attach to their victim with the
front sucker, create a wound, then suck out blood with, usually, both suckers.
Blood-sucking leeches give out a liquid substance called Hirudin. This
chemical prevents the blood from thickening and enables the blood to be
easily sucked by the leech.
Doctors once used leeches, or what they called medicinal leeches, to
remove blood from patients in an orderly manner. The first clinical use of
leeches in this fashion occured approximatly 2,500 years ago. Since the
leeches bite produces a small cleeding wound ,that mimics a venous
circulation in an area of compromised tissue, the leech is particlarly valuable
for reconstruction surgery. Special properties of the bite, such as the
chemical hirudin, allow continued bleeding for up to 48 hours after the leech
Hacking into large companies or agencies to steal one’s card information has become simple. Lewis (2013) says that, “Hacking is incredibly easy; survey data consistently shows that 80 to 90 percent of successful breaches of corporate networks required only the most basic techniques“(p. 1). On November 27, 2013, Target’s security was breeched when forty million credit and debit cards were stolen. The breach lasted from November 27 to December 15, 2013.
Based on Three Reasons College Still Matters, there are three main reasons why a college education is so important. From an economical standpoint, an education is most of the time needed to earn enough money to live comfortably. Attending and completing college provides a possibility for future economic stability. Within a highly competitive workforce a college degree can put a foot in the door to a job of a person’s choice. Statistics show that people who obtain a bachelor’s degree or higher get paid more than those who do not obtain one. Many question the worth of a college degree because of how expensive it is, though some say that the money spent is an investment on a person’s future. One can say that the worth of a college education is within the eye of the beholder. Many q...
In this essay I am going to discuss the causes of the civil war and if slavery was one of the main reasons it happened. I think the civil war started because of lots of different reasons, slavery and the westward expansion being some of them, but I am going to talk about how I think slavery is definitely one of the main causes.1 In 1808 there were more than one million slaves in the United States. The number of slaves continued to increase. In some Southern states for example, South Carolina, slaves outnumbered the amount of the white population. Slavery started to come about around 1776. Slavery had been practised in British North America from early colonial days. Slavery was recognised in the thirteen colonies at the time of the Declaration of Independence.
Just outside the boundaries of the Roman empire of the first and second centuries, beyond the Rhine River, and occupying the area of Central Europe of what is today Germany, lived the tribes of the Germanic people. In Germania, the Roman historian Cornelius Tacitus gave an account of the lifestyles and organization of these peculiar barbarians. These descendants of modern Germans proved peculiar in that they adopted many qualities typical of barbaric cultures, yet they simultaneously practiced virtues more befitting of advanced civilizations, values more ethical than even the Roman empire of the time. The German warriors had a rigid code that defined how to live honorable lives and shameful acts to avoid committing, and the warriors also adhered to strict tradition in their relationship with their king or chief.
The American civil war was an important event in the history of United States. It changed the internal structure of American society and had a greater impact than the revolution. The basis of the civil war was due to slavery. It overthrew the once dominated planter elite politically and its slaveholding class. During early decades of the nineteen-century the planters of American south were not about to follow the path of gradual emancipation that the northern states had raged. The economies of the south and north, continues to go in opposing directs.
With the advancements in technology today, the process of learning has become easier. Instead of just reading, one can look at video documentaries or web sites to acquire information they need or want. In my Latinos in the U.S. class, we have access to all types of information in our quest to learn about Mexican-American history. By reading Zaragosa Vargas= Problems in Mexican-American History, looking at the Chicano Park web site and viewing part one of the Chicano! video documentary, I have encountered a variety of representations of Mexican-American history. However they are not all of the same quality for the video and web site do not give as much information as the readings in Vargas= book or the class lectures and discussions do. Both the video and web site touch on a very small portion Mexican-American history, however, they only refer to the Treaty of Guadeloupe Hidalgo established in 1848 and that Mexicans are of Aztlan heritage.
The Civil War was an important war over the freedom of slaves in the U.S.. The Civil War is well known for being caused by the issue of slavery, but it is really a combination of different events and actions that caused tensions to rise throughout the country. The economic and political issues in the U.S., along with certain actions caused the Civil war, which is one of the United States’s worst wars. All in all, the Civil War was one of the most devastating wars for our country as a whole, and the process of rebuilding would take years and is no easy job.
The carnivorous worm Hirudo medicinalis, commonly known as a leech, has recently been approved by the FDA as a medicinal device. In June, 2004 the FDA gave the French company Ricarimpex SAS a license to market leeches for medical use in the United States. Leeches are commonly used post-operatively in reconstructive surgery. It is difficult for ruptured veins to rejoin after surgery without any vessels to drain blood away. This can cause cells to die from oxygen deprivation. Leeches can eliminate this by sucking the pooled blood, which allows the body to re-establish the network of blood vessels (Pilcher 2004). There are also recent studies being done on the use of leeches in the treatment of osteoarthritis. This condition occurs when cartilage in the knee joint breaks down. This causes a great ...
Fox, R. 2001. Invertebrate Anatomy OnLine: Artemia Franciscana. Lander University. http://webs.lander.edu/rsfox/invertebrates/artemia.html, retrieved February 13, 2011.
The civil war was a start of a new era. Colored people were still treated unequally, but they were no longer forced to work on cotton or other crop farms. The civil war had a long lasting effect on our nation. The United States lost many lives fighting in this war, but in the end it ended slavery and the division between our country.
Easy believes that they have no right to arrest him unless there is evidence that he has committed a crime. Regardless, the police arrest him. Taken to the police station, he is beaten but soon he is free. “Through the adventures and the ambivalence of the black detective, Devil in a Blue Dress enacts a Foucauldian structure which teaches that power, like law, is not an order to be retrieved but the contingent result of specific circumstances that black men may understand through violence and adapt to their own needs for respect and freedom”, says Marilyn Wesley in her article (Power and Knowledge in Walter Mosley 's Devil in a Blue Dress, 104). Indeed, blacks treated unjustly with police brutality alone is one of the reasons why Easy decides to work on the case as a private investigator rather than seeking the help of the police. Hence, the characters in the novel believe that the only way to be respected and solve issues is through violence. Overall, with his pride in owning a home and staying away from places with white people, race controls the actions of
When thinking about skinhead gangs in London, it is impossible not to conjure up images of shaved heads and heavy Doc Martin boots accompanying a particularly racist kind of violence with no respect for authority structures of the state. However, did these gangs begin with such a clear idea of their purpose? Were they aware that their daily activities would become a “subculture” along with the Mods and Rockers? In his essay titled “The Skinheads and the Magical Recovery of Community,” John Clarke argues that skinheadism is about the recovery of a community in working class neighborhoods where this feeling had been lost due to various changes in socio-economic conditions. He says that their feeling of exclusion “produced a return to an intensified ‘Us-Them’ consciousness” (Clarke, 99). Though the realization of this distinction plays a major part in the formation of any subculture, the Us-Them discourse turns out to be much more complicated in the case of skinhead gangs, and the space that these groups occupy in relation to the outside world does not have such clear boundaries. Looking at three different representations of Skinhead culture: the novel A Clockwork Orange (1962) by Anthony Burgess, the non-fiction work The Paint House (1972) by the Collinwood gang, and the film Scum (1979) directed by Alan Clarke, the evolution of this space over time becomes clear. This change happens both in the way the gangs define and view themselves, as well as in the way mainstream society deals with the problem of violence in “Modern Youth” (Burgess, 41).
The social impacts of slavery seemed to outweigh the economic impact even though there were tremendous profits made in many ways. Slavery literally defined the Southern society. “—whether in civilized or in savage society, or whether in regard to individuals, families in successive generations, or to more extended
The dishonesty that Allie 's mother conducted when hiding the letters that Noah had mailed to Allie, displayed what Hutchison (2015), describes as conflict perspective. Allie’s mother felt she was doing the right thing with hiding the letters, she felt her daughter deserved more than a common life and that Noah could only supply that lifestyle. She felt if she did not hide the letters her daughter would make the wrong choices and could possibly affect her life forever.
Baboons belong to the Old World monkey family, Cercopithecidae. They are found in Africa, south of the Sahara as well as in the Saudi Arabia desert (Class Notes 6/12/01). There are five subspecies of baboons including the hamadryas, the Guinea, the yellow, the chacma, and the olive baboons.