If the oxygen in the blood cannot reach the heart muscle, the heart becomes damaged.

If oxygen cannot reach a certain area of the brain, that area experiences tissue damage.

The coal continues to burn slowly back into the seam until oxygen (air) can no longer reach the flame front.

I.e., the more you exercise regularly, the more oxygen can reach your muscles.

I connected the oxygen, intercom and radio cables to my helmet, then reached for the starting switch on the left engine.

As each hole in the glass joins to the next, water movement is claimed to be self-perpetuating but oxygen only reaches the outer surfaces.

DNA "keeps" in amber because no oxygen can reach it.

By the time Ngawang's heart started beating again, however, a period of approximately ten minutes had passed in which little oxygen had reached his brain.

When the oxygen reaches the heart, tissue cells there use it to create distinctive water molecules that can be measured.

The hallucinations should stop as the oxygen reaches your brain.