Dissection of a sheep's heart

Not today, I am actually uploading this a little late. Not just a little actually very in fact. Ok, we dissected a sheep's heart but I was not the one dissecting it personally. It was my friends who dissected it and I took a video of the process. However, the process was long as we couldn't exactly find everything. And I took the video on my phone but my phone is unable to send such a large file to the computer or to my friends. *sighs* It's okay I took some pictures. :)

Basically, we were tasked to find the thickness of the atrial wall. According to what we measured for the thickness of the atrial wall, for the left atrial wall it is 2.1 cm thick as for the right atrial wall it is 0.8 cm thick.

I'm sorry but I don't know how to label the picture with arrows and stuff on the online journal.

As for the septum, it is 1.7 cm thick. I'm really sorry that I don't really know where the labels are as I need to read up on my notes first to understand better.