About This Chapter
The Five Senses of the Human Body - Chapter Summary
This chapter provides you with the opportunity to review the structure of sensory organs and how they work. Instructors with an educational and professional background in science and medicine guide you through the details of these anatomical lessons.
You will get extensive information about how the human body sees, hears and smells. Specific structures will be identified and defined and you will develop a deeper understanding of how the body processes information relating to these senses. By the time you are finished with this chapter, you should have the ability to:
- Describe olfactory structures and nerves that allow the human body to smell
- Identify the structures of the eye and their roles in how we see
- Discuss what allows us to see in detail, in daylight and at night
- List the nerves that allow the eyes to move and focus
- Name the external and internal structures of the outer and middle ear
- Relate the workings of the inner ear that help us to hear and maintain balance
Videos are short but informative and instructors use simple language to make learning the material easy and engaging. In addition to videos, each lesson contains a written transcript for easy reference and contains self-assessment quizzes that will help you gauge what you have learned and where you might need further review. You can even send questions directly to the instructor for further clarification.
1. The Sense of Smell: Olfactory Bulb and the Nose
How does the sense of smell relate to your eyes? Why can we smell something in the first place? These questions and many more will be answered as we look into the olfactory bulb, chemoreceptors, cranial nerve I, and the olfactory nerve.
2. The Eye and Eyesight: Large Structures
Would you be able to see anything without a lens in your eye? Does the lens change shape? Does the iris? What structure gives you your eye color? Find out all of this and about things like the ciliary muscles and the cornea as we delve into this lesson.
3. Receptors of the Back of the Eye: Retina, Rods, Cones & Fovea
Find out how we see the world in color, what rods and cones are, and how camera film fits into all of this. In addition, you'll find out what the retina is and what gives you the ability to see at night.
4. The Sense of Sight: Motion, Nerves and Eye Movements
Find out how cranial nerve II, cranial nerve III, cranial nerve IV, and cranial nerve VI help you see and control the movement of your eyes. You'll learn if there's a difference between those cranial nerves and that of the abducens nerve, oculomotor nerve, optic nerve, and the trochlear nerve.
5. Anatomy of the Ear's External Structures
What is the pinna? Is it the same thing as your earlobe? Does the eardrum have anything to do with the tympanic membrane? Find out as we explore all of this and other important structures involved in the sensation of hearing as sound enters your ear.
6. The Ear: Middle Structures and Hearing Functions
Find out about the malleus, incus, and stapes. You'll learn about the smallest bones in your body and find out what the ossicles are for. Finally, you'll find out how the oval window plays an important role in the transmission of sound.
7. The Inner Ear: Sense of Balance and Hearing
Learn how water is important when it comes to your inner ear, cochlea, and sense of hearing. Find out what cool names like the bony labyrinth, semicircular canals, ampulla, and vestibule mean.
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