About This Chapter
Basics of the Nervous System - Chapter Summary
This chapter helps you review the many components of the nervous system and how they work. Engaging video lessons explain topics including sensory nerves and the myelin sheath. Our expert instructors also help you better understand the anatomy of the ears, eyes, and spinal cord. After reviewing the lessons, you should be ready to:
- List the parts and functions of the central and peripheral nervous systems
- Discuss the divisions of the autonomic nervous system
- Recall the various parts of the brain
- Explain how the spinal cord interacts with the brain
- List different types of reflexes in the human body
- Explain terminology associated with nerves
- Describe why Schwann cells are an important part of neuron survival
- Identify parts of the eye and parts of the ear
These lessons are a fast way to get up to speed on nervous system basics. Vocabulary words are highlighted in bold for quick reference, and video timelines let you easily navigate to specific topics. Each lesson includes a full written transcript that you can print and use as a study guide.
1. Central Nervous System: Definition, Function & Parts
The body is divided into many systems. In this lesson, you will learn about the parts that make up the nervous system and their functions to gain a better understanding of this critical system.
2. Autonomic Nervous System: Function, Definition & Divisions
In this lesson we'll learn the definition of 'autonomic nervous system.' The lesson explores the system's function and gives an overview of the divisions that comprise the system. A short quiz will follow.
3. Peripheral Nervous System: Definition, Function & Parts
The human nervous system is very complex with many interactive units that are changing constantly to reflect human behavior and activity. This lesson focuses on the peripheral nervous system, including its function and parts.
4. Parts of the Brain
Is there a way to easily remember the many parts of the brain? Don't be afraid of all these complex terms; this lesson outlines some easy and fun phrases to help you memorize the brain's anatomy. Let's take a look.
5. Anatomy of the Spinal Cord: Function & Explanation
The spinal cord partners up with the brain to send information around the body as electrical signals. It tells the body what the brain wants and the brain what the body is feeling. This lesson explains how its structure helps accomplish this.
6. Reflex: Definition, Types & Examples
In this lesson, you will learn about reflexes in the human body. Different types of reflexes will be discussed and examples will be provided when appropriate. Finally you will be able to test your knowledge of the content by taking the quiz.
7. What is a Nerve? - Definition & Associated Terminology
This lesson defines and explains what nerves are as well as associated terminology: neurons, receptors, impulse, stimulus, ascending and descending nerve tracts, ganglion, and plexus.
8. The Myelin Sheath, Schwann Cells & Nodes of Ranvier
The myelin sheath is an essential part of our nervous system. Learn more about this neuron component, explore the nodes of Ranvier, and discover why Schwann cells are crucial for neuron survival.
9. Parts of the Eye and their Functions
Do you know the parts of the eye? If not, this lesson will help you to identify the parts of the eye and understand their specific functions. After learning about the eye, you will be able to test your knowledge with a quiz.
10. The Parts of the Ears
Your ears are made up of three main parts, the external ear, middle ear, and internal ear. Sound waves move into your external ear causing the eardrum to vibrate, which moves the tiny bones of your middle ear, and then it's on to the internal ear.
11. Sensory Nerves: Types and Functions of Sensors and Receptors
In this lesson, we will explore what gives you the ability to sense temporary and sustained pressure, touch, and vibration. In addition, we'll touch base on certain nerves that allow you to sense the coolness of an ice cube in your mouth or the sensation of warmth on your skin.
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