Fun Facts
The only sense linked directly to the brain's emotional center. Triggers strong memories
Smell
These are the basic "nerve cells" that carry electrical signals throughout your body
Neurons
light-detecting organs, sends visual signals to the brain via the optic nerve
Eyes
This response happens when you are scared. You may sweat and have an increase in heartbeat. (Hint: letter F)
Fight or Flight
The human brain is __% fat, making it the fattiest organ in the human body
Brain
This long bundle of nerves runs down your back and acts as the "highway" for signals traveling to the brain.
Spinal Cord
Vibration-sensing cells in this organ allow you to hear music and speech
Ears
The nervous system uses these types of ZAPS to send messages very quickly.
Electrical signals
Refered to as the second brain, it contains millions of neurons
the gut
If you lined up all the neurons in an adult's brain in a straight line, they would stretch for about ___ miles
600
While the brain and spine are the "Central" nervous system, all the other nerves in your arms and legs are part of this "P" system.
Peripheral Nervous System
Your sense of taste and this other sense work together to help you enjoy food.
Smell
This term describes actions you choose to do, like kicking a soccer ball or waving hello
Voluntary
The brain doesn't finish developing until about age __
25
In terms of storage, scientists estimate the human brain can hold as much information as the entire ___(in its earlier days). Think online
Internet
This is the quick, automatic reaction, ike blinking or pulling away from a hot stove, that happens without you thinking
Reflex
Largest organ of the body, filled with nerves that detect heat, pain, and pressure
Skin
This term describes actions your body does automatically, like digesting food or your heart beating
Involuntary
Your nervous system needs these two types of ions to conduct electricity
Sodium and Potassium
On average, your spinal cord stops growing at _ years old
4
signals from the Nervous system can travel up to ___mph
268mph(Sensory neurons) OR 180mph(Motor neurons, initiating movement
These specific types of cells are designed to pick up information from the environment.
Receptors
These are the chemical messengers (like Adrenaline) that the nervous system uses to change how you feel or act
Horomones or Neurotransmitters
The human nervous system contains around ___ billion neurons
100 billion