Li Ang certainly couldn't bring himself to transplant a stomach into his own body. After greeting Chaichai, he went to the market and bought several pounds of pig's blood to keep in reserve.
After returning home, he put on a Trait hazmat suit and, in the Breeding Box, cornered several pudgy, arm-sized, pink Nemertean Worms that had fed on Felix's fresh blood.
He took them to the sterile operating room. There, he slit them open and, using the Origin of Life, forcibly transplanted a Blood race stomach into each one, positioning it in the middle of its digestive tract.
A living being's immune system, composed of cells and organs, possesses the physiological ability to recognize its own self. It is quite advanced and comprehensive, capable of attacking bacteria, viruses, and foreign bodies.
This powerful, biologically evolved ability becomes a burden during organ transplants—the immune system will attack non-host organs, resulting in rejection.
