Science+20

10//1/2009 The Excretory System

Excretion: The removal of wastes from a living thing. Wastes produced in our body: carbon dioxide

9-24-2009 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 nervous system

Peripheral nervous system
 * Nervous- Travel through body; connect the spinal cord to sensors throughout the body voluntary

Voluntary Actions
 * things you do think about doing -

Brain
 * most important part of body
 * protected by skull and three layers of tissue

Cerebrum
 * two halves-- Right side is creativity, music,Art; Left side is reading and writeing

Cerebellum


 * Balance
 * Muscle coori