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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 heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
![Major moons of Uranus in order of increasing distance (left to right), at their proper relative size](https://biology-forums.com/gallery/47/medium_12359_13_01_13_4_50_58.jpeg)
![Like all animals, primates must balance their calories expended searching for food with calories, pr](https://biology-forums.com/gallery/47/medium_275816_26_01_15_5_23_43_20418105.jpeg)