BIG IDEAS: Multicellular organisms rely on internal systems to survive, reproduce, and interact with their environment.
CONTENT:
A NURSE'S GUIDE TO THE HUMAN BODY - contains many great links for kids to each of the body systems
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Nervous
The Nervous System (6min4sec)
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Nervous System
Tasting, smelling, seeing, hearing, thinking, dreaming, breathing, heart beating, moving, running, sleeping, laughing, singing, remembering, feeling pain or pleasure, painting, writing...you couldn’t do any of these things without your nervous system! Your nervous system is made up of your brain, your spinal cord, and an enormous network of nerves that thread throughout your body, it’s the control center for your entire body. Your brain uses information it receives from your nerves to coordinate all of your actions and reactions. Without it, you couldn’t exist! |
Neurons—Electric Cells
As you read this lesson, your nervous system is performing a complex series of electrical events, all propagated along neurons. Neurons, along with neuroglial cells, are specialized cells that make up the nervous system.
The nervous system is divided into two functional divisions—the peripheral nervous system (PNS), made up of motor and sensory neurons, and the central nervous system (CNS). Neurons are found in both systems. These two systems will be explored in future lessons.
There are three kinds of neurons: motor neurons, sensory neurons, and interneurons.
As you read this lesson, your nervous system is performing a complex series of electrical events, all propagated along neurons. Neurons, along with neuroglial cells, are specialized cells that make up the nervous system.
The nervous system is divided into two functional divisions—the peripheral nervous system (PNS), made up of motor and sensory neurons, and the central nervous system (CNS). Neurons are found in both systems. These two systems will be explored in future lessons.
There are three kinds of neurons: motor neurons, sensory neurons, and interneurons.
- Motor neurons carry impulses (individual electrical events called action potentials) from the central nervous system (brain and spinal cord) to muscles and organs (i.e., the heart)
- Sensory neurons carry impulses from the sensory receptors (any cell that detects external or internal stimulation, such as those in the retina of the eye that detect light) to the central nervous system
- Interneurons carry impulses from sensory neurons to motor neurons, and are located solely in the central nervous system
The Structure of a Neuron (3min28sec)
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Homeostasis: A survival story (7min17sec)
THE SENSES
Adrenaline: Fight or Flight (6min36sec)
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Hidden Curse: The inability to feel pain (2min5sec)
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Sensation: The mind body connection (5min21sec)
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Polygraph Tests & the Nervous System (3min55sec)
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