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Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Location of breath sounds. Location of breath sounds.
GI series. (a) Upper GI series begins with a barium swallow, barium shake, or barium meal. (b) Lower GI series. (a) Upper GI series begins with a barium swallow, barium shake, or barium meal. (b) Lower
Hormones Location of Glands Hormones Location of Glands
Cylinder 1 and timing mark location guide. Cylinder 1 and timing mark location guide.
Location and Responses of Adrenergic and Cholinergic Receptors Location and Responses of Adrenergic and Cholinergic Receptors
Organic Diets Significantly Lower Children’s Dietary Exposure to Organophosphorus Pesticides Organic Diets Significantly Lower Children’s Dietary Exposure to Organophosphorus Pesticides
Video: Primary and secondary response to infection

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