What organs are being affected from liver cancer and how?

Still, it is more common for cancer to begin in other parts of the body, such as the pancreas, stomach, breast or lung and then spread to the liver as a secondary cancer. You are more likely to develop liver cancer if you have hepatitis or cirrhosis, which is the scarring of the liver cells.

 Cancer can start in the liver or spread there from somewhere else in the body

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.