Of the resources necessary to sustain human life, oxygen is by far the most critical. Within minutes of the oxygen in our tissues being depleted, any oxygen-starved cells will begin to die. Because oxygen is delivered to our cells by the blood in our circulatory systems, the cause of oxygen starvation in our body tissues is usually a blockage of blood flow. The most readily recognized health problems caused by this severe lack of oxygen in our tissues are heart attacks and strokes.
- Osteo-WHAT? (lupuschronicles.com)