-
epithalamus in some vertebrates. The eye is at the top of the head; is
photoreceptive; and is ****ociated with the
pineal gland,
which regulates circadian...
- The
eyespot apparatus (or stigma) is a
photoreceptive organelle found in the
flagellate or (motile)
cells of
green algae and
other unicellular photosynthetic...
- in the iris just
behind the cornea. The lens
hangs behind the pupil;
photoreceptive retinal cells line the back. The
pupil can
expand and contract; a retinal...
-
immense variation in
visual systems ranging from
photoreceptive cell
patches seen in
simple photoreceptive systems to more
derived complex eyes seen in box...
- Eye
types can be
categorised into "simple eyes", with one
concave photoreceptive surface, and "compound eyes",
which comprise a
number of individual...
- development. The
pineal body also has
photoreceptive cells which,
though regressed,
retain visual pigment like the
photoreceptive cells of the
regressed eye. The...
-
their early embryonic cells into two germ
layers (ecto- and endoderm).
Photoreceptive eye-spots evolve. 650-600 Ma Urbilaterian: the last
common ancestor...
-
structurally complex phenanthroperylene quinone with
potential medical and
photoreceptive applications. It is red-colored,
photosensitive compound whose biosynthesis...
- flatworm,
Thysanozoon nigropapillosum, is
somewhat cephalized, with a
distinct head end (at right)
which has
pseudotentacles and an
photoreceptive eyespot....
-
colleagues showed that
photoreceptive ganglion cells may have some
visual function in humans. The
photopigment of
photoreceptive ganglion cells, melanopsin...
