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Entering the Dark Age of Malaysia...

Tuesday, March 06, 2007

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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.




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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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.

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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

32 comments:

Anonymous said...

T.Q. very much ESH .This post indeed helped us alot in gaining our understanding of the rat anatomy.

Anonymous said...

oh my god!!! why i don't know what is that photos shown d? blur blur leh... cham liao lor!!! and the photos that posted here different with what kts gave us see today... very different!!! so what to do? haiz... just can say that the photos here not so nice lor... sorry for this critical comment... but really blur... anyway just thanks for the person who post the things here lar... 'xing ku le'!!!

at last wish all the best in the coming dissection practical ya...

Anonymous said...

xiao yin here....

haha,finally i leave a comment here.....
wah,so coooool le the photos......where u get it..???

C.Guevara said...

anonymous#1,
thanks alot:P thanks for supporting this blog....... hope this post works.... anyhow its just for reference use only.,... refer to the kts notes as well:P
who is ESH anyway? do i know him/her? i'm che guevara...





anonymous#2,

well its very different from what koay tian soo let us see that day.... maybe its becoz the rat in my photos here are PRESERVEd, which i dont think is as "fresh" as the one kts has......... anyway, we're gonna see with our own eyes whats in the rat next weeek:P







xiao yin,
hahaha good lar you ,..... promised me liao sure have to post comment here lar:D hahaha these photos i get from a college student's website ... the website was originally for their assignment i think... hope he's not gonna get copyrigh$$ from me...........lolz

housefly said...

hey sorry, today baru c ur new post><

very kind of u to spend 3 hrs sharing all this info with ur classmates=)i think the photos quite clear ah.i tot it wld be berlumuran darah,but v clear.

i think it's very difficult to identify organs in real life situation when u only have black and white 2-D simplified diagrams. and no two rats are identical(unless they r clones) so u can never get an exact match.

u guys r so lucky!i would have loved to disssect a rat and see the organs we learn in textbooks.

of coz not ur testis lar, if it's urs then manz,ur doomed, so SMALL=p

n anonymous2, ppl post for u, dont complain lar

Anonymous said...

Wah ! So great ! Although v c these pic is bit geli but it can at least help us as reference la ...
i hope i can handle it on 13th Mac ! I ll remember it whole my life cos it is my 1st time dissect animal !
Lastly i hope v all bio students can BERJAYA !

C Guevara said...

haha housefly....

i dont really have time to post things up regularly...... only when i have important issues....

haha actually the rat in these photos was killed and preserved... and i think the blood had been washed away or dried up already..... hope the real one is not gonna be bloody!


and you know what, dont worry if you cant get yourself a rat to dissect... coz after one or two years you're gonna dissect dead men! :P hahaha that would be even bigger project than this 100gram rat..



AHEM.... not to mention mine (t******es)...... 100X bigger than the poor o tiny rat ..... *sneering at the mouse*


LOLZ

Anonymous said...

hihi,the photo is great.some one from our class said tat she can not eat after seeing the photo.i think the photo is quite interesting.wanna save some of tat picture in my friendster and scare some of my friend tat is not from bio stream.ha ha ha ha.

c.guevara said...

i think the rat in these posted photos are abit "cleaner" than that we've done today.... i cut a few blood vessels accidentally, and the blood started to flow ... yucks and at the last session of today's work , the rat started to stink like sort of...erm.... dead chicken meat?? dunno that smell... it smelled pretty heavily once i cut open the abdomen part///////




nice experience i had today...

Anonymous said...

thx for your recommendation to this page. it realy acknowledge me so much bout rat anatomy. mm..it seems not so disgustin anyway,i guess i can cope with it well^_^

c.guevara said...

lolz... to anonymous,
welcome... :P thx for visiting anyway... hope you can follow up the most updated news of our class and school in jitsinexpress.blogspot.com

Best of luck in ur rat dissection practical!>

lolz...

Anonymous said...

Thank you so much for these detailed and labeled pictures. Well done

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