Questions and Answers
What is the sclera?
What does the optic nerve do?
What is the primary function of the cornea?
What is the function of the lens?
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What does the ciliary body do?
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What is the role of the choroid in the eye?
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What does the retina do?
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What is the optic disk?
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What function does vitreous humor serve?
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What is the primary function of the pupil?
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What is the role of the iris?
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What is unique about the choroid?
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What does the ciliary body look like?
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What is the structure of the cornea?
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Describe the optic nerve.
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What does the pupil do?
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What is the retina beneath the choroid?
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What functions are associated with the sclera?
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What are key components of the eye and their respective features?
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Which structures are associated with the optic nerve?
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What does the ciliary body and lens do?
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Identify the primary components of the iris and pupil.
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Study Notes
Eye Anatomy Key Terms
- Sclera: Tough, white outer coat of the eyeball; attachment site for eye muscles.
- Optic Nerve: Cranial nerve responsible for transferring visual information from the retina; appears as a white line at the back of the eye.
- Cornea: Clear, dome-shaped surface that covers the iris and pupil; allows light to enter the eye.
- Lens: Transparent structure that focuses incoming light to form images on the retina.
- Ciliary Body: Black structure with "spokes"; adjusts the shape of the lens for focusing; anchors suspensory ligaments.
- Choroid: Thin black/brown layer beneath the sclera; contains blood vessels that deliver oxygen and nutrients to the retina.
- Retina: Light-sensitive layer of tissue at the back of the eye; receives light focused by the lens.
- Optic Disk: Area where the optic nerve exits the retina; known as the blind spot due to lack of photoreceptors.
- Vitreous Humor: Gel-like substance filling the eye; helps maintain its shape.
- Pupil: Opening that allows light to enter the eye; size is controlled by the iris.
- Iris: Colored part of the eye; regulates the amount of light that enters by controlling the size of the pupil.
- Tapetum Lucidum: Iridescent layer in some animals; provides a blue-green sheen and enhances low-light vision.
Functions and Additional Information
- Pupil Function: Regulates light entry into the eye for optimal vision.
- Iris Function: Adjusts pupil size based on light exposure; expands or contracts to control light intake.
- Choroid Function: Provides nutrients to the retina and absorbs excess light to enhance visual clarity.
- Extraocular Muscles: Control the movement of the eye; important for tracking and visual focus.
Surface Structure
- Cornea is the primary outer layer that is clear and refractive, critical for focusing light.
- Sclera provides structural support and protection; it is durable and opaque.
- Choroid layer complements functions of the retina, supporting its health and operation.
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Description
Explore the key components of the sheep eye with this flashcard quiz. Each card features a specific part of the eye along with its function, helping you understand the anatomy and physiology of vision. Perfect for biology students and anyone interested in eye dissection.