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Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

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There are more bacteria in your mouth than there are people in the world.

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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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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Structures of the oral cavity, pharynx, and esophagus. Structures of the oral cavity, pharynx, and esophagus.
The respiratory system: nasal cavity, pharynx, larynx, trachea, bronchus, and lung with expanded vie The respiratory system: nasal cavity, pharynx, larynx, trachea, bronchus, and lung with expanded vie
The respiratory system. (a) Sagittal section of the head and neck, revealing the organs of the upper The respiratory system. (a) Sagittal section of the head and neck, revealing the organs of the upper
Overview: Nose, Pharynx, Larynx, and Trachea Overview: Nose, Pharynx, Larynx, and Trachea
Pharynx Pharynx
Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx. Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx.
Video: Cognitive development by Piaget (Preoperational stage or intelligence)

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