Anatomical structures

Retinal rod

Retinal rod
Anatomical structures Retinal rod

Synonym(s): Rod Photoreceptor

Definition: One of the two major types of PHOTOREPTORS in the vertebrate RETINE. The 110-125 million rods allow mesopic and scotopic vision (twilight and night vision respectively) and are about 500 times more sensitive to light than the rods.

Hierarchical classification

  • Nervous system
  • Neuron
  • Afferent neuron
  • Photoreceptors
  • Vertebrate photoreceptors
  • Retinal rod

See also

  • External rod expansion

Summary

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