Hello, and my name is Caiden, today I will be talking about rat dissection, I will now be explaining why we use model organism and what are some other examples of model organisms. We use model organisms because they are less expensive and very accurate to humans also because they are perfectly big enough to check stuff like the organs, model organisms are used to figure out how genes, cells, and organs work and to investigate human diseases. Here are some examples of model organisms, Mouse, Rat, Chicken, Guinea Pig
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Teeth and diet of Rats
Rats have 4 incisors and 12 molars, the incisors are located at the bottom and top front of the mouth used for gnawing and biting through tough material. A rat’s diet is the diet that scientist gives rats are grains, seeds, nuts, fruits, vegetables, and small insects or meats.
Step by step process:Rat Dissection
- We first examined the rat, what teeth did it have, and what gender it is, males have visible testicles and females have visible nipples.
- We cut down through the middle to examine the muscles and carefully move away the skin from the muscles to expose them to cut them with scissors
- Carefully open the belly with a scalpel then insert the blunt end into the body and cut downwards this exposes the organs like the heart ribcage then use the sicssors and cut both sides to open up the rat this exposes all the organs heart, lungs, instestines, stomach, liver, etc
How were the rats identified as female and male
They were identified on the outside by the visible nipples which means their female and visible testicles which means their a male. It was also identified as a male on the outside by looking for the Seminal Vesicles and Vas Deferens the female was it identified when looking for the uterus Overies and Vagina.
Organs seen during the experiment
Thats all thanks for reading and goodbye.