About This Chapter
The Five Senses - Chapter Summary and Learning Objectives
Can you name all five senses? You probably can, but can you explain how each of them work or what components make them up? That might be trickier. In this chapter, you will learn all about the five senses (sight, hearing, taste, touch and smell), their functions and the different components of each of them. You'll watch lessons that focus on things like the structures of the eye, external ear structures and sensation in the face. Some of the specific things you'll learn in this chapter include:
- How the olfactory bulb works
- How information is sent via the optic nerve
- The structure of the external ear
- The ear's connection to balance
- How facial movements occur
- Nerves of the face and mouth
|The Sense of Smell: Olfactory Bulb and the Nose||Discover how the sense of smell really works.|
|The Eye and Eyesight: Large Structures||Examine the large structures in the eye, such as the cornea, pupil, lens and iris.|
|Receptors of the Back of the Eye: Retina, Rods, Cones & Fovea||Explore what happens in the back of the eye to aid eyesight.|
|How Receptors of the Eye Conduct Information via the Optic Nerve||Find out what the optic nerve does.|
|The Sense of Sight: Motion, Nerves and Eye Movements||Study how sight works.|
|Anatomy of the Ear's External Structures||Analyze the external structures in the ear.|
|The Ear: Middle Structures and Hearing Functions||Take a look at the middle ear and how hearing occurs.|
|The Ear: Sense of Balance and Inner Ear||Discover the job of the inner ear and how it is connected to balance.|
|The Ear: Hair Cells, Organ of Corti & the Auditory Nerve||Explore the roles of hair cells, the organ of Corti and the auditory nerve.|
|Cranial Nerves of the Face and Mouth: Motion and Sensation Functionality||Examine how motion occurs and sensations are felt in the mouth and face.|
|Cranial Nerves: The Vagus Nerve and its Functionality||Learn more about the vagus nerve and how it functions.|
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. How Receptors of the Eye Conduct Information via the Optic Nerve
You will learn how your eyes are able to see the image in front of you thanks to special cells called photoreceptors. In addition, these receptors have very important proteins called rhodopsin and photopsin; and all of these things work together to transmit information to your optic nerve.
5. 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.
6. 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.
7. 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.
8. 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.
9. The Ear: Hair Cells, Organ of Corti & the Auditory Nerve
In this lesson, you'll learn the most important things about cranial nerve VIII, the auditory nerve and the Organ of Corti. In addition, you'll realize that even though you may not like it, your ears are quite hairy thanks to hair cells.
10. Cranial Nerves of the Face and Mouth: Motion and Sensation Functionality
We wouldn't be able to talk, taste, chew, or swallow without the cranial nerves of our face and mouth. Find out how these nerves help us move our tongue and enjoy everything from kissing to food to conversation.
11. Cranial Nerves: The Vagus Nerve and its Functionality
Find out what the vagus nerve (cranial nerve X) does in your body. While perhaps not as impressive, you'll also find out what the accessory nerve (cranial nerve XI) does and why it is important to the vagus nerve.
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Other chapters within the Biology 105: Anatomy & Physiology course
- Overview of Anatomy and Cell Biology
- Human Respiratory System
- Cardiovascular System
- Blood Vessels
- Digestive System
- Urinary System
- The Endocrine System
- The Brain
- The Nervous System at the Cellular Level
- Muscle Physiology
- Gross Anatomy of Muscular System
- Connective Tissue
- Skeletal System
- Male and Female Reproductive Systems
- Studying for Biology 105