Modeling a liver using primitive opengl commands

i’m quite a new programmer in opengl. i want to model a liver and other irregular shape objects using primitive opengl commands, without relying on available higher API and software such as Maya, 3DMax, etc.
i would like to see some sample in C/C++ implementation. any one can please help ? thanks a lot !

Usually ,application read the modeling data into the memory and opengl is used to display and manipulate the 3d model.Draw the 3d model line by line can be very time-consuming.

Just my 2 cents.