If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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People about to have surgery must tell their health care providers about all supplements they take.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
Renin Angiotensin Aldosterone System
A central port fuel-injection system.
Lymphatic system vessels and the flow of lymph.
The Skeletal System and Homeostasis
The Muscular System (Anterior View)
Organs of the human male reproductive system, their functions, and locations.