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There are more sensory neurons in the tongue than in any other part of the body.
Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.
Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
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.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
![Nebulizer. The nebulizer converts a liquid medication to a mist that is easily inhaled. A face mask,](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_25_46_100642210.jpeg)
![Tracheostomy. A tracheotomy, or incision into the trachea, is performed to create an opening into th](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_25_47_100681765.jpeg)