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Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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

Ventilation of the mammalian lung by negative pressure filling. Ventilation of the mammalian lung by negative pressure filling.
Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
Bergmann’s and Allen’s rules expressed in two rabbit species. (a) A snowshoe hare. (b) A desert-livi Bergmann’s and Allen’s rules expressed in two rabbit species. (a) A snowshoe hare. (b) A desert-livi
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
How to plot a sine function with a negative amplitude and phase shift (Question 3 of 3) How to plot a sine function with a negative amplitude and phase shift (Question 3 of 3)
Collage of people showing emotions Collage of people showing emotions
Video: The Krebs Cycle Animation

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