Rod cell
Rod cell
Rod cells, or simply rods, are photoreceptor cells in the retina of the eye that can function in less intense light than the other type of visual photoreceptor, cone cells. Rods are concentrated at the outer edges of the retina and are used in peripheral vision.
Pronunciation
- IPA: /rɒd sɛl/
Etymology
The term "rod" is derived from the cell's rod-like shape, while "cell" comes from the Latin cella, meaning "small room".
Function
Rod cells are responsible for vision at low light levels (scotopic vision). They do not mediate color vision, and have a low spatial acuity.
Structure
The anatomy of a rod cell is unique. It consists of four distinct regions: an outer segment, an inner segment, a cell body, and a synaptic terminal.
Related Terms
External links
- Medical encyclopedia article on Rod cell
- Wikipedia's article - Rod cell
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