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Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Did you know?
Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Did you know?
Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
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![Renal transplant. A transplanted kidney is placed within the pelvic cavity below the location of the](https://biology-forums.com/gallery/47/medium_14755_26_10_12_5_21_06_96721064.jpeg)