The nervous system controls all activities of the body and is composed of the brain, spinal cord, and nerves. It allows the body to react to stimuli in the environment through automatic responses not requiring thought, such as blinking when something comes near the eye. The central nervous system is made up of the brain and spinal cord, with the brain having three main parts - the cerebrum, cerebellum, and brain stem - that control functions like thinking, memory, movement, balance, and posture.

1. PREPARED BY- SURBHI UPMANYU IV I

2. Nervous System A system that controls all of the activities of the body. The nervous system is made of: The brain The spinal cord The nerves The senses

3. The nervous system also allows you to react to a stimulus. Stimulus A stimulus is a change in the environment. Example: A hot stove Or… tripping over a rock

4. Your reactions are automatic. Automatic Automatic means that you do not have to think about your reactions. Example: If a bug flies by your eye, you will blink.

5. Brain An organ that controls your emotions, your thoughts, and every movement you make.

6. Outer Nervous System The Outer Nervous System is made of the nerves and the sense organs. Nerves Sense organs

7. Nerve Impulse Messages carried throughout the body by nerves.

8. "Funny Bone" You have a nerve along your whole arm. The “funny bone” is the only place on the arm where the nerve is not protected. The “funny bone” is on the elbow.

9. The Central Nervous System * The Central Nervous System controls all of the body’s activities. * The Central Nervous System is made of two main organs. 1. The brain 2. The spinal cord

10. The Spinal Cord * The spinal cord sends messages to the brain. * The spinal cord is the part of the nervous system that connects the brain to the rest of the nervous system.

12. The Three Parts of the Brain * The Brain has three main parts… 1. The Cerebrum 2. The Cerebellum 3. The Brain Stem

15. The Vertebrae * The vertebrae are the many bones that protect the nerves in the spinal cord.