'Stomach' in the Bible

Do you not understand that whatever enters the mouth passes into the stomach and is afterwards ejected from the body?

because it does not go into his heart, but into his stomach, and passes away ejected from him?" By these words Jesus pronounced all kinds of food clean.

Food of all kinds is meant for the stomach, and the stomach is meant for food, and God will cause both of them to perish. Yet the body does not exist for the purpose of fornication, but for the Master's service, and the Master exists for the body;