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There are several similarities between the digestive system of a rat and a human as far as location and function are concerned. Both mammals possess the three main areas of the digestive system: salivary glands, the oral cavity, and the abdominal cavity. Each of these is subdivided into specific organs.
Digestion, by definition, is the process by which food substances are chemically altered into forms of energy where they can be absorbed through cell membranes.
Because a rat's digestive tract is so similar to that of a human, it is fair to say that they function in similar ways.
An animal's diet is revealed by its dentition pattern. This refers to the types of teeth the animal has, the number of teeth, and how they are arranged. There are three main types of dentition patterns: herbivourous, carnivorous, and omniverous. Rats and humans are both omnivores, meaning they eat meat and vegetation. Rats, however, need to chew more rough food, like tree bark, and in domestic rats, chew toys. This is because their front incisor teeth would, if left to grow freely with nothing to wear it down, would grow through the rodents jaw. This of course, would never happen with humans. Human teeth stop growing after they reach a certain point.
Another major difference between the rat and human digestive tract, aka the alimentary canal, is the fact that while we as humans have gall bladders, rats do not. Instead of a gall bladder, rats have a bile duct (ductus choledochus) which is formed from several tubes from the liver. the various lobes of the liver unite to form this tube (the bile duct) and this allows the transport of bile into the duodenum.
Also, because rats do not have gall bladders, they are more apt to graze constantly throughout the day, which is why (if you have a pet rat--though i doubt this..) you are not supposed to just continually feed them throughout the day. Because they do not have a gene to trigger a feeling of fullness, rats would (along with other rodents, such as guinea pigs, hamsters and mice) literally eat themselves to death.
And finally, because i have to finish a lab report (on a rat dissection no doubt)..when the food enters the caecum (latin spelling of the word..it can also be spelled cecum!) the nutrients is then absorbed. Many anumanls, including man, have a short veriform appendix at the end of the cecum, this is absent in the rat. Oh and rats do not have uvula (i do not know if i said that already) but its true (haha i are dork!)
If this was helpful. that's awesome. have a swell day!
What else can I help you with?
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A dog does not know the difference between a gerbil and a rat.
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It has "parts" too!
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