Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Carried through body happens if cancer cells enter the blood stream.
What happens if cancer cells enter the blood stream?

Gabbro is a dark dense rock that can be found in the oceanic crust.
Gabbro is a dark dense rock that can be found in what?

Diaphragm, lungs, and trachea take air deep into the body and provide oxygen gas to the bloodstream.
Diaphragm, lungs, and trachea take air deep into the body and provide oxygen gas to what?