Boot files and windows are in seperate partitions. Why?

Win 7 Ult 32bit, Lenovo G550, 2gb ram, ~300gb hdd, Intel dual core 2.3ghz

Hello. I have a recently bought Lenovo G550, and it has two hdd partitions. My question: why is partition C (with windows) is boot, page file, crash dumping, primary partition, and then the other, G partition, is System, Active, Primary partition? This is according to Disk manager.. Why can't it be like partition C is everything for system and stuff, and G for simple storage? Can i move boot files to C?
Thanks!

 

Looking at my own pc, I have 8 partitions, c: is set as boot (the one I am using), and D: is showing system files, other prtions just show as healthy logical drives.
I can boot into any of my partitions- when you start up, do you see a breif showing of two options to click on to startup in ?
If not that drive could be a recovery partition, as I have seen these at the end of a hard drive

 

I think baklogic may be correct - that G is a recovery partition. What are the sizes of C and G, and what are D, E and F, removable drives?