Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Pretty much what the title states.

Some cells/structures in the human body undergo rejuvenation periodically by flushing away older cells and growth of new ones. E.g Skin, Blood

Does this (for want of a better word) 'rejuvenation' apply to Rods/Cones within the eye too? If so, how are the old cells flushed out - or do the old cells become part of the local humour?

share|improve this question
up vote 9 down vote accepted

The answer can be found in the excellent lecture from 1983 The Life History of Retinal Cells which also has gorgeous microscope fotos. The renewal time of rod outer membrane proteins is less than two weeks. Cells stay indefinitely, as I understand, but are periodically rebuilt in a logistical nightmare/wonder.

share|improve this answer
Thanks. That is a great reference – TomD Jul 16 '12 at 18:18

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.