1. The Human Nervous System

2. The Nervous System has TWO Major Divisions. The Central Nervous System The Peripheral Nervous System

3. The Central Nervous System (CNS) The Central Nervous System (CNS) consist of the Brain and the Spinal Cord. The spinal cord carries messages from the body to the brain. Response messages are then passed from the brain through the spinal cord and to the rest of the body.

4. Brain One of the most active organs of the human body. Major parts of the Brain: –Cerebrum (Cerebral Cortex) –Cerebellum –Medulla http://www.teachersdomain.org/asset/idptv11_vi d_d4kbrn/

5. Cerebrum Voluntary action is controlled here- Senors are interpreted Motor activities Memory Reasoning thinking

6. The Cerebellum Coordinates motor movement (muscles)for smooth movements Helps maintain balance

7. Medulla Oblongata Connect the spinal cord to all other parts of the brain Control involuntary activities –Breathing –Heartbeat –Blood flow –Coughing –http://www.teachersdomain.org/resource/tdc02.sci.lif e.reg.teenbrain/

8. THE SPINAL CORD Important Function –Connects the nerves of the peripheral nervous system with the brain –Sends messages to and from

9. The Peripheral Nervous System (PNS) Nerves that extend throughout the body Somatic-nerves that control voluntary muscles Autonomic-nerves that control involuntary system: cardiac muscle, glands

11. REFLEXES A reflex is an involuntary response to a STIMULUS. Types of Neurons (that make up nerves) Sensory-transmit impulse from receptor Motor-cause muscle or glands to respond Interneuron-interpret and relay impulses between sensor and motor neurons http://wps.aw.com/wps/media/objects/443/ 454059/st0807.html