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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

The thyroid gland is subdivided into two lobes, one on each side of the trachea. The thyroid gland is subdivided into two lobes, one on each side of the trachea.
The anterior pituitary gland and its target organs. The anterior pituitary gland and its target organs.
Examples of endocrine disorders. (A) A patient with exophthalmos, a symptom of hyperthyroidism ... Examples of endocrine disorders. (A) A patient with exophthalmos, a symptom of hyperthyroidism ...
Hypothalamus and Pituitary Gland Hypothalamus and Pituitary Gland
Other Endocrine Tissues and Organs, Eicosanoids, and Growth Factors Other Endocrine Tissues and Organs, Eicosanoids, and Growth Factors
Development of the Endocrine System Development of the Endocrine System
Video: Major Elements in Biological Molecules: Carbohydrates

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