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- Learn at Your Pace: You can pause and rewatch lessons as often as you'd like, until you master the material.
- Learn how the nose is able to smell.
- Understand how the major structures of the eyes impact vision.
- Explain how the structures at the back of the eye help us see.
- Describe how the optic nerve carries sensory information from the eyes to the brain.
- Take a look at the nerves involved in the sense of sight.
- Understand how the structures of the outer ear contribute to our ability to hear.
- Discuss how the structures of the middle ear help us to hear.
- Explain the role of the inner ear structures in hearing and balance.
- Describe how hair cells, the auditory nerve and the organ of Corti help us hear.
- Understand how the cranial nerves of the face and mouth are involved in motion and sensation.
- Discuss the function of the Vagus nerve.
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.
12. What is the Pupil of the Eye? - Definition & Function
You may not think there is much to the pupil of the eye, but it's a window to your emotions and a key feature in managing the amount of light that gets into your eye. Learn about the pupil and all that it does in this lesson.
13. Peripheral Vision: Definition & Problems
You use your peripheral vision every day, but do you know how it works? This lesson dives in to the details and brings you up to speed on everything you need to know about peripheral vision.
14. Accommodation Reflex of the Eye: Definition & Purpose
The accommodation reflex of the eye is the involuntary response your eye has when it switches from an object far away to one that is closer to you. This lesson discusses what this reflex is and why it's important.
15. What Is Visual Acuity? - Definition, Scale & Tests
Visual acuity is a measure of how clear and sharp your vision is. To standardize this, it's measured at different distances so that the results from many people can be averaged together. This lesson will explain visual acuity and the different tests used to measure it.
16. Adequate Stimulus for Sensory Receptors
This lesson will describe the basics of how your sensory receptors communicate with your brain. Readers will discover which types of stimuli trigger different sensory neurons and what the adequate stimulus for a particular sensory neuron is.
17. What Is Binocular Vision? - Examples & Advantages
This lesson discusses binocular vision and what it has to do with 3-dimensional sight. It compares binocular with monocular vision, and explores the advantages of each using examples of animals with each type of vision.
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