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Did you know?

Your heart beats over 36 million times a year.

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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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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

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

Comparison of breast cancer and fibrocystic disease. (A) Breast with a malignant tumor growing in th Comparison of breast cancer and fibrocystic disease. (A) Breast with a malignant tumor growing in th
Hypothyroidism. Hyposecretion of the thyroid gland produces the symptoms that are illustrated. Hypothyroidism. Hyposecretion of the thyroid gland produces the symptoms that are illustrated.
Cirrhosis. Cirrhosis is characterized by a chronic deterioration of the liver, replacing healthy cel Cirrhosis. Cirrhosis is characterized by a chronic deterioration of the liver, replacing healthy cel
Receptive Tissue of the Vestibular Sacs: the Utricle and the Saccule Receptive Tissue of the Vestibular Sacs: the Utricle and the Saccule
Common skin signs are often evidence of an illness or disorder. A crust is a dry, serous or ... Common skin signs are often evidence of an illness or disorder. A crust is a dry, serous or ...
Laparoscopy. A laparoscope is used to view reproductive organs. Laparoscopy. A laparoscope is used to view reproductive organs.
Video: Introduction to Genetics

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