Science+1

9/24/09---Nervous System Central Nervous System
 * Brain- gets and sends signals around the body; Major Control Center of Body
 * Spinal Cord- is protected by spine; Connects the brain to the rest of the nervous system

Peripheral Nervous System
 * Nerves- Travel through body; connect the

_ 10/1/2009 Excretory System

Excretion: The removal of wastes from a living thing.

Wastes produced in our body: carbon dioxide, inorganic salts, heat, water, nitrogen
 * organs of the Excretory system: lungs,**, Kidneys, Liver, Skin