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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 familiar sounds of your heart are made by the heart's valves as they open and close.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.