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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
There are 60,000 miles of blood vessels in every adult human.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.