Transcript The Brain
The Nervous System Principles of Health Science What is the nervous system composed of? • Brain • Spinal Cord • Nerves • Sense Organs • Receptors Fun facts first! What’s it made of? • 77% Water • 10-12% Lipids • 8% Protein • 1% Carbs • 2% Soluble Organics • 1% Inorganic Salt There are… • 100 Billion Neurons in the Human Brain About The same amount… • Of Stars in the Sky The left hemisphere has… • 186 million more neurons than the right hemisphere. 750-1000ml of blood flow… • through the brain every minute. • This is about 3 full soda cans! The brain can stay alive… • 4-6 minutes without oxygen! The slowest neurons in the brain… • travel at 260 MPH. • As “slow” as today’s fastest car! (Clocked at 253 MPH) More electrical impulses… • Are generated in one day by a single human brain than all the telephones in the world. The human brain has… • 70,000 thoughts in an average day. FUNCTIONS OF THE BRAIN (or noodle) Left vs. right • Logical • Creativity • Mathematical • Imagination • Linguistic • Speech • Artists • Dreamers • Visual Spatial How does the brain communicate with the rest of the body? neurons Sensory Neurons • Specialized to detect senses • Example: pressure or heat Motor neurons • Impulses that signal muscle contractions… motion. interneurons • Connect with other neurons. CFU Please put your notes away and your thinking cap on. Rules: • Use your motor neurons (raise your hand) if you think you know the answer! • If you get it right then I will feed your sensory organs. Part of the nervous system that starts with a “B” #1 Name that neuron: (The connection of neurons) #2 Two Parts of the nervous system that start with an “s” #3 Name that Neuron: (Senses heat) #4 Part of the nervous system that starts with an “N” #5 Part of the nervous system that starts with an “R” #6 Name that Neuron: #7 Name that Neuron: #8