First Rat Done; No Second One.
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First Day

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- Everyone waited for Mr Koay early in the morning. And he was late...excuse given? "Haiya, I purposely come late one lar, .. You all dunno meh? If i come earlier I would have to kill those rat...See now Mr.Jalil done it all for me already....Yea, I dont kill.".... Sounds like a "guru" :S None of us seemed to be afraid of the rat, and i think girls had managed their fear for the tiny creature in quite an "elegant" manner.. eg: holding the pity-o-rat using only finger tips, as if it is smelly and dirty. But to my surprise, the dead rats werent smelly at all..
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- Morning breeze with Dettol smell. Yep. After the rats had been killed, they were soaked in Dettol solution. Each and everyone of us got one white corpse. Some girls wanted small rat , and some prefered female rat... Reasons ? They said big rats are disgusting and female rats have no big testicles like the males... Thank goodness i got a giant male rat, and why? Coz those who got small ones found it difficult to see the abdoments and blood vessels in detail, and the most interesting prize goes to those who got pregnant female.......... MUAHAHA.....
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- Actually the procedure to dissect a rat is quite simple, at least it is compared to those docs who deal with human body. First, pin the rat on the dissecting board with their abdominal part facing upwards; Second, use forceps to pull their skin up; Third, use the blunt-head scissors to cut the rat's skin; Fourth,....... Am I gonna type all that here? Crazy !the procedures are pages long.

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Please Read The Biology Student's Manual

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- At first we thought that we're lucky coz the dead rat didnt smell bad. But, after around two hours, they started to stink. YUCKS......... they smell exactly like dead chicken..... Luckily we were able to get the first phase done before 12.30pm. Amazingly, most of us were able to maintain our appetite for lunch:P

.(Pull downwards for more photos)

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Second day

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- Nobody dared to open the rat's coffin. We stored all the dissected rats into formalin solution earlier that day. And for the second time, we'll have to operate on the same rats again but this time the target part is the thoracic region. Chun Keat was appointed as the undertaker, so he took out all the dead things and delivered to everybody. Although the rats were preserved with formalin, the unstopable smell ruined our nerves. YUCKS again. And this time I didnt get to wear a surgical mask coz there was no enough masks for each and everyone of us. The dissection continued.......

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Please Read the Biology Student's manual

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- A group of girl yelled hysterically. I didnt know what was happening. But then i saw Koay Tian Soo was chopping down a rat's head. He looked desperate. This bloody secene reminded me of the video tape released by the Iraqis insurgents who beheaded a Korean. No comments. Humans shall always rule the beings on earth... this is what i knew....

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And yea, no more second rat for us to dissect as Koay Tian Soo had promised us earlier. The excuse? " ahaha.... i think most of you were doing good enough already... and most of you here can identify the blood vessels... ermmm... ermm... i dont think we will have to dissect the second one already lar......" What an excuse:P To me its a great loss for not being able to dissect a second one but to most of the girls, its a great relief...
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What a pity: 32 rats were being killed and soaked in Dettol.

Family Disaster : Father(top), Mother(middle) and Son(the bottom) of the rat's family laid dead on the lab's table.

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Rattus Expert : Lee Ing(first from left), Mr.Koay a。k。a 小郭，Li Qun and Woan Pyn. Mr.Koay is the one who claimed himself as an "enlightened guru" that never kills.

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Rat's anatomy: Abdomens and intestines of a dissected male rat.

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Displaying: Rat being pinned on a waxed board before furthur incisions.

Great job: Lee Showing off his perfectly dissected rat.

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Serious matter: Chin Yee is pulling out the intestine of the rat carefully. Nice work man!

Guru said we are qualified as true biology students only when we've dissected a rat. And here we've done it:P Congrats everyone! WOnderful experience with ya all in the lab!:P

C.Guevara

Tagged

This post has nothing to do with Bio One, and its quite a personal one. This is called a chain game or what( i prefer to call it a chain curse,lol) as it has such wacky rule for each tagged blogger:


*tagged by Housefly-ing*


Each player of this game starts off with ten weird things or habits or little known facts about yourself. People who get tagged must write in a blog of their own ten weird things or habits or little known facts as well as state this rule clearly. At the end you must choose six people to be tagged and list their names.


1. I'm a nocturnal being.( I love night and I hate daytime. I love stars and moon but not the sun)
2. Have a very constant body weight (hard to shed my weight)
3. Dont wear shirt when at home.
4. Have 3 twister-shaped-hair-"formation" on both my hands and another one on my back
5. Saliva "pouring" out from mouth whenever i fall asleep.
6. Like to clean my ear using cotton buds. (a must-do everyday, dunno why)
8. Walk and talk in my sleep (complained by mom,and scared my grandpa once)
7. Enjoy being massaged and scratched at the back.
9. Like to express my own thinking and philosophy (many ppl dont like it)
10. Get choked very easily when talking to girls.

Sorry buddy i gotta tag ya!

1 Yee Piao
2 MichelleBeh
3 Hong Hui
4 Christina Goh
5 Li Yin
6 Nics Ooi












C.Guevara

Attention to All Bio One Students,


Date of rat dissection will be changed from the originally
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13th March(Tuesday)
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15th March 2007 (Thursday)

due to some difficulties faced by Mr. Koay Tian Soo. For those who have tuition classes or other planned activities which fall on 15th of March, please post here, or contact Mr. Koay Tian Soo/ Lee Chun Keat as soon as possible. It's advisable to make your own arrangement so that this Thursday is available for rat dissection.



C. Guevara

Rat Dissection - What You're Going to See.

As what I had mentioned earlier before, we are going to dissect two rats; one is for practise and another one is the real practical in which you'll be evaluated for the practical paper. I had already went through the photostated paper which have been delivered by Mr. Koay Tian Soo and I dont think the real situation matches exactly the same as what you can see from his notes. Well, I'm not saying that the notes cannot be used, just that I think its better to scan through the photos of rat's anatomy, so that you all can get better picture of what you're going to see when dissecting a rat next week. I have just found a very dependable source from the internet which has part of what we need to know while identifying the rat's anatomy. Below are some very detail photos of rat's anatomy... Let's check it out man!

Before you proceed, its important to know that NOT ALL information provided here can be used. Any misconducts later is not within the Blog Owner's responsibility.

I would like to dividethe rat's anatomy into three parts, which consist of rat abdomen, rat reproductive and excretory and also rat cardiovascular.

Rat Abdomen

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Initial incision into a preserved male rat.

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1. Left uterine horn 2. Kidney 3. Colon with a fecal pellet inside 4. Liver 5. Spleen
6. Right unterine horn



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1. Liver 2. Caecum 3. Small instestine 4. Seminal Vesicle 5. Body wall 6. Stomach
7. Greater omentum 8. Spleen

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1. Stomach - body portion 2. Stomach - pyloris portion 3. Stomach - fundus portion
4. Pyloric sphincter 5. Liver

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1. Spleen 2. Small intestine 3. Pancreas 4. Liver 5. Stomach 6. Blunt probe
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1. Small intestine 2. Caecum 3. Mesentery 4. Small intestine
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1. Tougue 2. Soft palate 3. Hard palate 4. Cheek teeth

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The ear region

1. Ear 2. Parotid gland 3. Skeletal muscle

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Throat region of a dissected, preserved rat

1. Larynx 2.Thyroid 3. Mandibular gland 4. Trachea

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Rat Reproductive and Excretory

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Female abdominal region of a preserved, dissected rat.

1. Uterine horns 2. Urinary bladder 3. Uterine body 4. Colon with a fecal pellet

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Rat's ovary region. The picture was taken through a dissecting scope with approx 20X magnification

1. Ovary 2. Oviducts(Fallopian tubes , uterine tube) 3. Uterine horns (uterus)

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Abdominal region of a female pregnant rat... Pitiful lor..

1. Uterus with embryo visible nearby 2. Caecum 3. Left uterine horn 4. Embryo in left uterine horn

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Closeup on the left side of a female pregnant rat.... T.T

1. Embryo in left uterine horn 2. Oviducts 3. Ovary( greatly enlarged from normal, non-pregnant state)

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Testicle region of a male rat, not mine, k?

1. Scrotum 2. Epididymis 3. Tunica vaginalis (covering the testis) 4. Testis

5. Vas deferens

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Cross section view of a preserved rat's testicles. Photo taken under magnification through dissecting scope.

1. Scrotum 2. Seminiferous tubules inside the testis 3. Tunica vaginalis

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Reproductive region of dissected male rat.

1. Prostate glands 2. Urinary bladder 3. Seminal vesicles 4. Small intestines

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Kidney and adrenal gland area of a dissected rat

1. Adrenal gland 2. Kidney

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Rat Cardiovascular

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Thoracic region of a preserved and dissected rat. Latex was injected into the rat to make vessels more visible.
1. Inner wall of the rib cage 2. Lung 3. Right artrium 4. Right ventricle
5. Thymus gland 6. Left artrium 7. Diaphragm

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Thoracic region of a rat after the thymus gland has been lifted up from its normal position, exposing the arteries underneath.

1. Lung 2. Right artrium 3. Right ventricle 4. Aorta 5.Innominate artery

6. Thymus gland

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Thoracic region of a dissected rat, exposing the thoracic arteries.

1. Lung 2. Right artrium 3. Right ventricle 4. Innominate artery 5. Aorta

6. Pulmonary trunk artery 7.Left common carotid artery 8. Left subclavian artery

9. Remains of left anterior vena cava (removed to expose arteries)

10. Left internal mammary artery 11. Right subclavian artery

12. Right common carotid artery 13. Left axillary artery

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Blood vessels of the abdominal region of a dissected rat.

1. Colon 2. Iliolumbar vein 3. Internal spermatic artery 4. Common iliac artery

5. Posterior mesenteric artery 6. Common lilic artery 7. Internal spermatic artery

8.Iliolumbar artery 9. Iliolumbar vein 10. Posterior vena cava

1.. Abdominal aorta 12. Renal vein 13. Renal artery 14. Kidney

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OMGoodness....... ! Three hours spent!... My longest post ever..

Although this is just a post for reference, I still hope that it can help ya all handling the experiment in a easier way, where you can identify the parts of the rat very quickly.

Quote

Mr.Koay , " Girls, until now there is still no record of girl get fainted when seeing the rat. I dont care. Whether you want to cry, shout, laugh or what, I just want you all to get the rat dissected. Or else you'll have to bring the body home..........

............and lastly, dont be afraid while cutting the rats. You have no choice but to kill it. And the only way you can repay their lives is to score A in Biology STPM."

Special thanks to Marc Perkins and Bryan Yang for their nice photos.

Compiled and edited by N. Mandela & C. Guevara

Good luck mates!( Comments PLEASE!!!!)

C.Guevara