|
|
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.
![Illustration showing how the primary breast tumor metastasized through the lymphatic and blood vesse](https://biology-forums.com/gallery/47/medium_14755_27_08_12_12_17_41_8191646.jpeg)
![Spinal cord—levels of injury; A, areas of sensory function (dermatomes); B, areas of motor function.](https://biology-forums.com/gallery/47/medium_18099_25_10_12_10_55_44.jpeg)