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

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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

The Green Pygmy Goose (Nettapus pulchellus) is a small perching duck which breeds in southern New Gu The Green Pygmy Goose (Nettapus pulchellus) is a small perching duck which breeds in southern New Gu
The Xenopus frog tadpole is a small, simple vertebrate. The Xenopus frog tadpole is a small, simple vertebrate.
Australopithecus sediba shares small brain size with other members of Australopithecus but also has Australopithecus sediba shares small brain size with other members of Australopithecus but also has
Small Intestine (SI) Small Intestine (SI)
The price of rice in a small country is currently $6 per pound. In order to help low-income ... The price of rice in a small country is currently $6 per pound. In order to help low-income ...
There are four hospitals (consumers in this example) willing to pay the following amounts for a ... There are four hospitals (consumers in this example) willing to pay the following amounts for a ...
Video: Chemical Changes

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