Question

Why foreign body or metal glass is not digested by our digestive juice??

Answer 1

We know that their are different enzymes present in our alimentary canals parts which are responsible for thier action of digestion.

Since, their is no enzymes to act on these metal or glasses to digest, so they never digest in our alimentary canal.

Answer 2

 Your stomach’s primary digestive juice, hydrochloric acid, can dissolve metal, but plastic toys that go down the hatch will come out the other end as good as new. (A choking hazard is still a choking hazard, though.)