How does the brain work together with the other organs in your body?

The brain is a marvelous organ. It collects data on your being and surroundings, and can analyze these to detect problems or advantageous conditions.

It senses the position of the body, and sends signals to the limbs (for example) to perform actions.

Your eyes are an extension of the brain surface, most of which is light sensitive.

Specialized different areas are responsible for hearing and speech.

The brain needs an oxygen supply to keep going - indeed the brain and blood supply appear in the records at the same time. Earlier primitive animals have a sensory apparatus, but not yet a brain.

There are several separate parts to the brain, probably reflecting ancient evolution of this organ.

The connections between the brain and the rest of the body, are by means of nerves as above, and by chemical hormone signals via the blood supply.