CPU (Central Processing Unit)
The CPU (Central Processing Unit) is like your brain, it sends signals or commands to the computer parts. It contains the ALU (Arithmetic Logic Unit) and the CU (Control Unit) which help make the CPU work.
Arithmetic Logic Unit (ALU):
ALU does all the arithmetic (addition, subtraction, multiplication, and division) operations and logical operations.

Control Unit (CU):
The CU decides the most efficient method to work. The CU also preforms many tasks like taking guidelines, controlling sequential execution, managing information stream in the correct course, directing and observing the time needed amid the preparing and taking care of different function and a lot more.

Motherboard

The motherboard is the main circuit of the computer, It’s like the backbone of the computer without it none of the computer parts would work!
SSD and HDD
The SSD (Solid State drive) is data storage device that uses flash memory to store data just like camera. SSD’s have a much faster read/write speed than HDD (hard disk drives.) They also have no moving parts, which means they don’t make noise or break as much. However, SSDs are more expensive than a hard drive.
The HDD (hard disk drive) is also a data storage device for computers. The storage of a HDD can be measured in gigabytes and sometimes in terabytes. They also make a lot more sound than a SSD but have more storage capability.

RAM
RAM (Random access memory) is a memory or information storage in a computer that is used to store running programs and data for the programs. RAM is a chip-like component.

Graphics Card
The Graphics Card is a special circuit board that controls what is shown on a computer monitor and calculates 3D images and graphics. This gives your computer projector input so you can play minecraft!

Power supply

The Power Supply unit converts AC (Alternating current) to DC (Direct current.)
I think that the Motherboard is more than being a spine, I think it is also a heart.