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Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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.