The liver is a very important organ in your body, yet is a mystery to most of us. This unit focuses on the biology and functions of the liver, particularly as they relate to drug abuse and risky behaviors. It focuses on several examples of consequences of risky behavior. To illustrate these consequences, I describe the effects of two viruses that are fairly common and can have major consequences for the liver and general health. The first is hepatitis C virus (HCV), which is usually spread through sharing needles, including IV drug abuse and tattoos and piercings with unsterilized, shared needles. HCV can also be spread sexually. Hepatitis B virus (HBV) is generally spread by unprotected sex, although it can also be spread through sharing needles. I also describe the effects of acetaminophen (Tylenol). Acetaminophen is a very common over the counter drug. In high doses, it can destroy the liver. In fact, it can do major damage in recommended doses if the patient has a compromised liver. The unit is also about the ethics of organ transplants. Finally, it touches on artificial organs. This was written for high school health, but would be suitable for biology as well. It would be appropriate for middle school.

(Developed for Health, grades 9-12; recommended for Health and Biology, Middle and High School grades)