胃腸

1. Origins, structure, and basic meaning

• Structure: 胃腸 is read as いちょう and is a noun for the stomach and intestines together or, more broadly in context, the digestive tract.
• Basic usage: Use 胃腸の働き for digestive function and 胃腸が弱る when that system is weakened or upset.

2. Common pitfalls and similar expressions

• Not the stomach alone
  • 胃腸 joins the stomach and intestines and can cover the digestive system rather than only the stomach.
• Organs and functional condition
  • A model can show how the organs work, while heat can affect their functional condition and appetite.