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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
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.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
![First-pass effect: (a) drugs are absorbed; (b) drugs enter hepatic portal circulation and go directl](https://biology-forums.com/gallery/47/medium_46687_12_12_14_7_07_21_195641052.jpeg)
![Tooth development and eruption are commonly used to assess age in the subadult skeleton. Deciduous (](https://biology-forums.com/gallery/47/medium_273688_23_02_15_8_21_18_208891445.jpeg)