Dissection of a Sheep Eye Lab Report PDF

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Summary

Biology lab report from dissection of a sheep eye...

Description

Laboratory Report: Dissection of Sheep Eye

1. Data Figure 1.1 Interior View of The Anterior Side of a Sheep Eye

Sclera Iris Cornea

Pupil Ciliary Muscles

Figure 1.2: Interior View of The Posterior Side of a Sheep’s Eye

Retina Sclera Tapetum

Optic Disc

Choroid Coat

Figure 1.3: Exterior View of The Anterior Side of a Sheep’s Eye

Cornea Sclera

Figure 1.4: Exterior View of The Posterior Side of a Sheep’s Eye

Optic Nerve

Figure 1.5: View of the Lens and Vitreous Humor From a Sheep’s Eye

Vitreous Humor

Lens

2. Analysis

Table 2.1: Table explaining functions of each eye structure labeled in the pictures of the interior and exterior views of the sheep eye in section 1 Eye Structure Function Retina Inner layer of eye, contains photoreceptors Leaves eye at blind spot and carries impulses Optic Nerve from rods and cones to brain Sclera External layer, tough, white of eye. Maintains shape and protects inside Choroid Middle layer, many blood vessels, contains melanin. Gives nourishment to other parts and absorbs scattered light rays to prevent reflection Ciliary Body (ciliary muscles) Attached to lens to change the curvature of lens Cornea Part of sclera, transparent (no blood), cleaned, moistened by tears. Lets light into eyes and bends light into rays Pupil Opening in the center of the iris to let light into the eye Iris Part of choroid, a sphincter muscle with a unique pattern. Adjusts size of pupil to control amount of light entering (adaptation) Lens Behind iris, attached to ciliary muscles by suspensory ligaments and elastic. Focuses light onto retina and changes shape to focus on far/near objects (accommodation) Vitreous Humor Jelly-like fluid filled inner chamber posterior to lens to maintain shape of eye Tapetum a reflective layer of the choroid in the eyes of many animals, causing them to shine in the dark. Fovea Centralis Small split in the retina. An area of densely packed cones for colour vision Optic Disk (Blind Spot) Part of retina that joins the optic nerve and contains no rods or cones and no photoreception...