It is indeed, however stomach transplants are rarely performed since it is actually possible to live without your stomach.
Yes
kidney and heart
the cornea
The transplantable organs are the heart, kidneys, liver, lungs, pancreas, intestines, and thymus. Additionally, various body tissues can be transplanted.
tibia
Valvs
Michael Petri has written: 'Studies on Nosema cuniculi found in transplantable ascites tumours with a survey of microsporidiosis in mammals' -- subject(s): Microsporidia, Microsporidiosis, Nosema cuniculi 'Studies on nosema cuniculi, found in transplantable ascites rumours with a survey of microsporidiosis in mammals' -- subject(s): Microsporidia
stomach acid is already in your stomach...
The stomach the stomach the stomach's job is to churn and mixed and digest food until it's a liquid.
The nervous system of the body is currently not transplantable. Damaged nerves can be grafted in the hope that they will grow back together, but this is not 100% reliable and no section of the central nervous system can be replaced once lost.
Stomach
In Canada you spell 'stomach' ... stomach.