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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Your heart beats over 36 million times a year.
Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.
The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.