Re: Internal organs homologous across phyla?
The general organ "eye" can loosely be considered homologous, if you
define eye as being a spot of rhodopsin
In which case you'd really define pineal gland as a thrid eye?
I just now looked it up. The human pineal gland (as well as chicken
pineal glands and other pineal glands) does indeed contain rhodopsin.
Therefore, I would consider it homologous to the eye.
.
Relevant Pages
- Re: Internal organs homologous across phyla?
... is called a pineal gland really is a photosensitive organ. ... fact a sort of third eye, ... I think that the pineal gland is the gland that controls the ... between antenna complexes and reaction centers in photosynthesis, ...
(sci.bio.evolution) - Re: Internal organs homologous across phyla?
... is called a pineal gland really is a photosensitive organ. ... fact a sort of third eye, ... primitive vertebrates all have photosensitive pineal bodies. ... I think that the pineal gland is the gland that controls the ...
(sci.bio.evolution) - Re: Battery/lighting philosophy for fully-loaded touring?
... Really bright lights result in a lot of light ... It takes about 45 minutes for the retina to become fully dark ... There is a theory that you can shut one eye when that happens to keep ... liver would make of the situation re rhodopsin shunting. ...
(rec.bicycles.tech) - Re: Battery/lighting philosophy for fully-loaded touring?
... It takes about 45 minutes for the retina to become fully dark ... There is a theory that you can shut one eye when that happens to keep ... liver would make of the situation re rhodopsin shunting. ... Build up of all-trans-retinal from the reaction ...
(rec.bicycles.tech) - Re: Internal organs homologous across phyla?
... contain rhodopsin or retinal. ... Because it serves as a light receptor. ... Actually the posterior pineal gland does contain both rhodopsin and ... pineal gland evolved. ...
(sci.bio.evolution) |
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