Spinal cord: very thick bundle of nerves, connects brain to nerves of your body. Most messages enter and leave your brain through here.

Nerves: they run through your body and carry messages. The messages tell your body how to move.

Brain: sends messages, and nerves through spinal cord to control movement of muscles and functions of internal organs.

Neurons: they join w/ cells to form nerves and they send messages to one another. They are responsible for thoughts, memories, and feelings.

Organs and Body parts included in the Nervous System