Rods

A) Photoreceptor cells that function in black and white vision
B) Photoreceptor cells that function in color vision
C) The opening in the iris
D) The innermost tunic of the eye
E) A pigmented contractile structure

Rods

Photoreceptor cells in the retina that are sensitive to low light levels and are responsible for night vision.

Photoreceptor Cells

Specialized cells in the retina of the eye that respond to light, enabling vision.

Innermost Tunic

The deepest layer of an organ or structure, often referring to the inner layer of blood vessels that is in direct contact with the blood.