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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.