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Rat Disection

In: Other Topics

Submitted By sheryin
Words 899
Pages 4
Observation :
Kidneys
Kidneys
Trachea
Trachea
Stomach
Stomach
Spleen
Spleen
Heart
Heart
Lung
Lung
Diaphragm
Diaphragm
Liver
Liver
Caecum
Caecum
Large intestine
Large intestine
Small intestine
Small intestine

Discussion :
The purpose of this experiment was to have a look at the interior and external body organs. As all mammals have very similar organs and bodies. They share very common transport and digestive systems. Rats compared to humans the only major difference is that the heart is 3 chambers humans have 4.The rat has had latex injected into it. So the blood vessel was easily seen and colorized. The rat's fur actually did not stay in its normal colour. It changed to a brownish yellowish fur. It may have something to do with the chemicals that it was soaked it.By doing this rat dissection we not only gain experience on how to do dissections but we also help us to study and learn about the digestive system and transport system in rats. Instead of reading off charts we can see and figure out for ourselves, we are also able to memorize the different sorts of organs in the rat easily. (Michael Kent, 2000)
The digestive system is the body system which breaks down large food particles into smaller units, which can be used by the body to promote growth, maintenance, and reproduction. Humans and most predators have a relatively simple digestive system. In the case of predators, this stems from their diet of primarily meat, which is rather easy to digest. In the case of humans, this is due to our lack of a specialize diet. Herbivores, however, usually have specialized structures because the cellulose in plant material is very difficult to digest.Rats, for instance, are granivores, which means they eat seeds and grains. Two key features to their digestive system are a lack of gall bladders and the presence of a large cecum. The gall bladder is used to

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