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On average, the stomach produces 2 L of hydrochloric acid per day.

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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

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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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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

The fossil Runcaria heinzelinii, a plant with a probable seed precursor. The fossil Runcaria heinzelinii, a plant with a probable seed precursor.
The seed-to-seed life of flowering plants. The seed-to-seed life of flowering plants.
The structure of fruits as adaptations for seed dispersal. The structure of fruits as adaptations for seed dispersal.
A plant grown from a [round, yellow] seed is crossed with a plant grown from a [ A plant grown from a [round, yellow] seed is crossed with a plant grown from a [
Receptive language usually develops before expressive language Receptive language usually develops before expressive language
The phenotypes and genotypes of the parents (P1) and the offspring (F1) in a cross involving seed sh The phenotypes and genotypes of the parents (P1) and the offspring (F1) in a cross involving seed sh
Video: Buffers definition and the role of buffer in the body

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