What would happen if genes for bone tissue were expressed in cells that line your stomach?

Your stomach would be made out of bone

Explanation:

The genes for your bone tissue are very different from your stomach cells. One creates a hard rigid structure the other create of soft skin-like tissue

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explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.