Describes the make-up of the heart. Role that oxygen plays. How circulation works. What happens when the heart stops beating. Cell death. Diagnosing the moment of death; what criteria to use. Brain-dead condition. Tests used to determine when a person can be called dead. Somatic (reversible) death; molecular (irreversible) death. Organ donations. Issue of quality of organs donated for transplants.
From the Paper:
"Most people accept that when the heart stops beating, a person dies. In the general sense, this is true, although with today's resuscitation techniques, the heart can be restarted if treatment is given quickly. The reason people die when the heart stops beating and is not resuscitated within a few minutes is that to stay alive, all tissues in the body require oxygen. When we inspire (breathe in), the lungs fill with air, and the oxygen, which is at a greater concentration in the air than in the blood circulating in the capillaries in the lungs, crosses the thin membranes of the lung tissue and the fine capillaries and enters the bloodstream. Erythrocytes (red blood cells) in the bloodstream contain a pigment called hemoglobin, which binds oxygen, and this pigment allows the erythrocytes to transport it to the tissues. When the oxygen-rich blood reaches the tissues and ..."
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