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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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There are approximately 3 million unintended pregnancies in the United States each year.

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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

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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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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Abiotic factors influence population densities. Abiotic factors influence population densities.
Example of the Index to Diseases and Injuries. Example of the Index to Diseases and Injuries.
Common Factors Affecting Urinary PH Common Factors Affecting Urinary PH
Sociologists study the social factors that underlie human behavior, the experiences that mold us, ... Sociologists study the social factors that underlie human behavior, the experiences that mold us, ...
Role of Factors of Production in Determining Growth, 1975–2009 Role of Factors of Production in Determining Growth, 1975–2009
Factors Affecting the Affinity of Hb for O2 Factors Affecting the Affinity of Hb for O2
Video: Spinal Cord Injury Animation

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