Question

part b assessments
complete the following:

1. which tunic/layer of the eye was the most difficult to cut?
2. what kind of tissue do you think is responsible for this quality of toughness?
3. how do you compare the shape of the pupil in the dissected eye with your pupil?
4. where was the aqueous humor in the dissected eye?
5. what is the function of the dark pigment in the choroid coat?
6. describe the lens of the dissected eye.
7. describe the vitreous humor of the dissected eye.

Explanation:

1. The sclera, the outer fibrous layer of the eye, is the toughest and most difficult to cut due to its dense, fibrous structure.
2. Dense fibrous connective tissue, which has tightly packed collagen fibers, gives the tough quality to the hard-to-cut eye layer.
3. A dissected animal eye (common for this activity) typically has a round pupil, matching the round shape of a human pupil; some species have different pupil shapes, but standard dissections use animals with round pupils.
4. Aqueous humor is found in the anterior chamber, the space between the cornea and the iris/lens, of the dissected eye.
5. The dark pigment in the choroid coat absorbs excess light inside the eye, preventing light reflection that would blur visual signals.
6. The dissected eye's lens is a clear, biconvex, flexible, and firm structure located behind the iris, responsible for focusing light.
7. The vitreous humor of the dissected eye is a thick, gel-like, transparent substance that fills the large posterior cavity of the eye, maintaining eye shape.

Answer:

1. The sclera (outer fibrous layer)
2. Dense fibrous connective tissue
3. The pupil of the dissected eye is typically round, matching the round shape of a human pupil.
4. In the anterior chamber (between the cornea and iris/lens)
5. It absorbs excess light to prevent blurred vision.
6. It is a clear, biconvex, flexible, firm structure behind the iris.
7. It is a thick, gel-like, transparent substance filling the eye's posterior cavity.