The cranial nerves are a set of twelve pairs of nerves that travel to and from the brain. Each has a different function. For example, the olfactory nerve is essential for detecting smells. The ...

The glossopharyngeal nerve is one of twelve cranial nerves that connect to the brain. Like the other cranial nerves, the glossopharyngeal nerve is paired — there's one on each side of your brain. The ...

The eustachian tube is a canal that connects the middle ear to the nasopharynx (the upper throat and the back of the nasal cavity). It controls the pressure within the middle ear, making it equal with ...

Evolution has left humans with many vestigial traits—remnants of once-useful biological features that serve little or no ...