science+7

10-1-2009 The Excretory System

Excretion: The removal of wastes from a living thing.

Waste produced in our body: water, heat,carbion

9/24/09-- Nervous System

Central Nervous System


 * Brain- gets and send signal around the body; Major Control Center of Body.
 * Spinal Cord-is protected by spin:connects the brain to the rest of the nervous system.

Peripheral Nervous System
 * Travel through the body: Connect the spinal cord to sensors through out the body.

Voluntary Actions


 * Things you think about doing---juggling, walking, reading, and bike riding

Brain


 * Most important part in our body
 * Protected by skull and three layers of tissue

Cerebrum
 * two halfves -- Right side is creativity-- Left side is used for logical thinking speech, writing, math
 * Right side

Cerebellum