Which term describes the structures including cornea, pupil, optic nerve, iris, lens, retina, rod cells, and cone cells?

Which term describes the structures including cornea, pupil, optic nerve, iris, lens, retina, rod cells, and cone cells?

• A. Outer ear
• B. Digestive system
• C. Parts of the eye
• D. Brain

Answer: (C)

These structures are all components of the eye, the organ responsible for vision. The cornea, pupil, iris, lens, retina, rod cells, cone cells, and the optic nerve together define the eye’s anatomy and function. Light enters through the cornea, is regulated by the iris and pupil, is focused by the lens, is detected by retinal cells—rods for light/dark and cones for color—and the resulting signals travel via the optic nerve to the brain. Because they all belong to the eye and contribute to its function, the term that best describes them is parts of the eye. The other options refer to different body systems: the outer ear is for hearing, the digestive system handles digestion, and the brain is the processing center, not the set of eye structures.

These structures are all components of the eye, the organ responsible for vision. The cornea, pupil, iris, lens, retina, rod cells, cone cells, and the optic nerve together define the eye’s anatomy and function. Light enters through the cornea, is regulated by the iris and pupil, is focused by the lens, is detected by retinal cells—rods for light/dark and cones for color—and the resulting signals travel via the optic nerve to the brain. Because they all belong to the eye and contribute to its function, the term that best describes them is parts of the eye. The other options refer to different body systems: the outer ear is for hearing, the digestive system handles digestion, and the brain is the processing center, not the set of eye structures.