Rats Essay

4232 Words Feb 29th, 2008 17 Pages
Rats are various medium sized rodents. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, R. norvegicus. Many members of other rodent genera and families are also called rats and share many characteristics with true rats. A rat has an average life span of 2-3 years[1].

Rats are distinguished from mice by their size; rats generally have bodies longer than 12 cm (5 in).
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* 1 Species and description * 2 As pets * 3 As subjects of scientific research * 4 Laughter in rats * 5 As food * 6 In culture o 6.1 In Eastern cultures o 6.2 In Western cultures o 6.3 In religion
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[edit] As subjects of scientific research

Main Article: Brown rats in science
A laboratory rat strain known as a Zucker rat. These rats are bred to be genetically prone to diabetes, the same metabolic disorder found among humans.
A laboratory rat strain known as a Zucker rat. These rats are bred to be genetically prone to diabetes, the same metabolic disorder found among humans.

In 1895, Clark University in Worcester, Massachusetts (United States) established a population of domestic white brown rats to study the effects of diet and for other physiological studies. Over the years, rats have been used in many experimental studies, which have added to our understanding of genetics, diseases, the effects of drugs, and other topics that have provided a great benefit for the health and wellbeing of humankind. Laboratory rats have also proved valuable in psychological studies of learning and other mental processes (Barnett 2002). A 2007 study found rats to possess metacognition, a mental ability previously only found in humans and some primates.[1][2]

On January, 2008, Doris Taylor, director, Center for Cardiovascular Repair, University of Minnesota used the core procedure of decellularisation to let hearts from animal cadavers beat by infusing live cells. The research

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