There are 12 cranial nerves in the body, all originating in the brain. They come in pairs and connect different body areas and organs to the brain. Cranial nerves can transmit two types of information ...

The shoulder plays a key role in the blood flow to the arms. The armpit and shoulder serve as the meeting place for the torso and arms, so major vessels close to the heart travel through these areas.

THE origin of vertebrate animals is to be found according to many morphologists in those invertebrates which are composed of a series of segments, and one of the chief arguments in favour of this view ...