Final answer:
Rods are rod-shaped photoreceptors in the retina that are sensitive to dim light and responsible for peripheral vision and vision in very dark environments.
Step-by-step explanation:
Rods are rod-shaped photoreceptors in the retina that are sensitive to dim light. They are responsible for peripheral vision and vision in very dark environments.
Rods do not yield color information, but they are important for motion detection and the ability to discern shades of gray.