Swallowing is the reflex in the human body that makes something pass from the mouth, through the esophagus, and to the stomach. If this fails and the object goes through the trachea, then choking occurs.
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In the human male, the urethra is about 8 inches (200 mm) long and opens at the end of the penis.
Medical problems of the urethra:
Hypospadias[?] is a form ...