[voice over] Many visits to the doctor start with taking your blood pressure. It's a vital indicator of your health. But within the human body, there are many pressurized systems, and each has its own threshold and consequence for pressure. Too much pressure on the lungs can cause them to collapse to 1/10 of their size. Skulls can only take so much pressure before the brain herniates into the spinal cord. Enough pressure on the limbs can cut off blood flow and kill them. The amount of pressure may vary, but every system has a breaking point.
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