The Nervous System
There are two parts to the Nervous system; The Central Nervous System & Peripheral nervous system. (CNS & PNS)
CNS= The brain and Spinal Cord
PNS= Nerves and supporting cells.
Information flow in
the Nervous system
PNS: Gathers information & sends it to the CNS
CNS: Processes the information and forms a response
PNS: Carries the response of the CNS system to the glands and muscles.
The Nervous system impulses are transmitted by cells called neurons. (See Fig. 31-2)
Copy Fig. 31-2 into notes.
Cerebrum: Largest portion of the brain controls voluntary conscious body activities. Site of intelligence, learning & judgment.
The Cerebrum has 2 sides called “hemispheres” (left and right).
Thalamus: receives messages from sensory receptors and relays them to proper region of the cerebrum.
Hypothalamus: control center for recognition, analysis, hunger, thirst, fatigue, , anger & body temperature.
Cerebellum: 2nd largest part of the brain, receives information about muscle & joint position and sensory input.
Brain Stem: connects the brain to the spinal cord. Regulates the flow of info from the spine/body to the brain.
Complete Nervous System Worksheet
Draw the brain onto your brown paper bag, label and color it. Use Page 903 as a guide DRAW THE PICTURE OF THE BRAIN THAT IS ON THE TOP OF PAGE 903 WITH THE LOBES. LABEL THE FOUR LOBES ON YOUR BAG ( Parietal, Occipal, Frontal & Temporal).