|
|
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
Did you know?
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.
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?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.