Biology experiment

I am finally back from kmm d... we will be having holiday start from Friday till evening in next Tuesday in conjuction with the Independence Day and First day of Hari Puasa. Envy izit? Let me tell you something that will make you even envy more. Just yesterday, same as other biology student, we had our first live dissect experiment. Its all about dissection of a half dead corspe. What corpse actually we used for the experiment? White rat!!! But it seems that the rat had been tainted with some yellow ink, most probably due to the overdose usage of antiseptic. The experiment was a wonderful experiment. We actually did slowly peel the skin , then dissect the body into half.

Then we were asked to examined the digestive system. After so many years of studying biology, I finally got the chance to touch and see it by my own eyes. The digestive system is just simply too beautiful. Other than that, we were also able to see the reporductive system of these tiny little mice. HOwever, due to the fact that, mine one is too small in size, still underage, we cant see the uterus obviously. But i saw some meat tumour near the right bottom of the mice. I think it might be the fallopian tube.

After that, we pierced through the diaphgram and use scissors to cut through the rib cage. Its awesome that the heart is still beating even though its dead d. Why the heart still keep on pumping although the host has dead d? The answer is simple. Its because we learnt that there's two type of node in our heart, S.A node and A.V node. The S.A node is situated at the ventricle, while the A.V. node is situated at the atrium. The heart is a myogenic organ. It works on itself, mostly of its activities is on his/her own feet, without the control of CNS and PNS. So, when the S.A node start to send signal to the A.V node, the ventricle will start to contract(diastole state). But due to the fact that most of the cells in atrium has found dead bcoz lack of O2, the signal cant be received by the cells in atrium. So, the atrium will juz remain in stationary, while the ventricle is trying very hard to contract, relax until all the o2 is used up.

After that, we operate the brain. But to our surprise, we actually break it. Nothing was left inside the skull. Even the tiny little brain has been crushed by our external force.

I think pictures make up a thousand word. So, have a look.

The pathetic tiny little creature. Amitabha.
My lovely malay classmate, Mus.
Wee, the heart.