Part A Drag the labels to the appropriate location in the figure. Pupil Lens Posterior cavity Iris Anterior chamber Ciliary body Canal of Schlemm Sclera Posterior chamber Cornea Suspensory ligaments Reset Help Anterior cavity
The Correct Answer and Explanation is:
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Based on the provided image, here’s the correct labeling for the Chambers of the Eye activity:
Correct Labels (from top to bottom, left to right in the diagram):
- Sclera – outer white layer of the eye, located at the top left.
- Canal of Schlemm – beneath the sclera, responsible for draining aqueous humor.
- Ciliary body – below the canal, involved in aqueous humor production and lens shape adjustment.
- Suspensory ligaments – threads connecting the ciliary body to the lens.
- Posterior cavity – large, vitreous-filled space behind the lens.
- Lens – transparent, biconvex structure for focusing light onto the retina.
- Iris – pigmented part that controls the size of the pupil.
- Pupil – the opening in the center of the iris allowing light to enter.
- Anterior chamber – space between the cornea and iris filled with aqueous humor.
- Posterior chamber – between the iris and lens; also filled with aqueous humor.
- Cornea – transparent outermost layer over the anterior chamber.
- Anterior cavity – encompasses both the anterior and posterior chambers.
Explanation
The human eye is a complex organ structured to allow precise control of light entry and image focus. The diagram represents a sagittal (side) view, showing internal components that regulate vision. The outermost layer, the sclera, provides protection and structural support, while the cornea allows light to enter the eye.
The anterior cavity is filled with aqueous humor and is divided into the anterior chamber (between the cornea and iris) and the posterior chamber (between the iris and the lens). This fluid is secreted by the ciliary body, which also helps to adjust the lens via the suspensory ligaments. The canal of Schlemm is vital for draining aqueous humor; failure in its function can cause intraocular pressure and lead to glaucoma.
At the center of the iris lies the pupil, which regulates light entry by expanding or contracting. The lens sits behind the iris and is crucial for focusing light onto the retina. It changes shape based on tension from the suspensory ligaments, a process controlled by the ciliary body.
Behind the lens lies the posterior cavity, also called the vitreous chamber, filled with vitreous humor—a gel-like substance that helps maintain eye shape and optical clarity.
Together, these structures work harmoniously to manage light flow, focus, and pressure balance, enabling clear vision. Understanding the anatomy and function of each part helps in diagnosing and treating common eye disorders.Tools
