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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.
Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.