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The horizontal fraction bar was introduced by the Arabs.

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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.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

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Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Cushing syndrome. This syndrome includes the symptoms of obesity, moon face, hyperglycemia, and musc Cushing syndrome. This syndrome includes the symptoms of obesity, moon face, hyperglycemia, and musc
Multisystem effects of premenstrual syndrome. Multisystem effects of premenstrual syndrome.
Boy with Down syndrome. Boy with Down syndrome.
Cross section of the wrist showing tendons and nerves involved in carpal tunnel syndrome. Cross section of the wrist showing tendons and nerves involved in carpal tunnel syndrome.
Fetal Alcohol Syndrome (FAS) Fetal Alcohol Syndrome (FAS)
Cushing Syndrome (Before and After) Cushing Syndrome (Before and After)
Video: Hormonal feedback loop components & Glucagon (glycogenolysis and gluconeogenesis)

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