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Did you know?
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
Did you know?
The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The longest a person has survived after a heart transplant is 24 years.