Science14

10/1/09---Excretory System Excretion: The removal of wastes from a living thing. Wastes produce in our Body


 * Carbon Dioxide, in inorganic salt, water, nitrogen, Heat

Organs of the Excretory System: lungs, Kidneys, Liver, Skin

9-3-09--- Nervous System

Central Nervous System
 * Brain - Gets and sends signals around the body; Major Control Center of Body
 * Spinal Cord - Is Protected by the spine; Connects the Brain to the rest of the nervous system

Peripheral Nervous System
 * Nerves - Travel through the body; connects the spinal cord to sensor throughout the body

Voluntary Actions
 * Things you think about doing --- Juggling, Walking, Reading, Bike Riding

Automatic (Involuntary Actions)
 * Things that you don't think about doing--- Breathing, Response to Danger, Blinking

Brain
 * Most Important Part of our body
 * Protected by skull and three layers of tissue

Cerebrum
 * Two Halves-- Right side is creativity, Music. Art; Left side is math, Logic,Speech,Writing
 * Right side if Brain controls left side of the body Left side of Brain controls right side of body

Cerebellum
 * For Balance

Medulla
 * Controls Heartbeat, Breathing