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Retina and fetus

Debate and discussion of any biological questions not pertaining to a particular topic.

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Retina and fetus

Postby Juggler » Wed Oct 05, 2011 5:02 pm

Hello! Could you please check if I got my homework right and, if not, help me with it? So here goes: http://imgur.com/OhPIy
The first is a scheme of a section of the retina of a human's eye. We're to name the elements of the retina marked as letters. That's what I have:
a - ganglion cell
b - bipolar cell
c - cone cell
d - rod cell
But I don't have even a slightest guess with e and f.. could you help me?

And regarding the other exercise: we're to complete the picture of a placenta by drawing the symbols of + (Rh+) and - (Rh-) and the symbols of the antigenes in such a manner that we'll depict an occurence of a hemolytic disease of the newborn. So I made it this way as I think during the first pregnancy (left picture) the child's blood won't have contact with the mother's until she gives birth. Then, as it would have a contact, she'll start producing antigenes and during her second pregnancy (right picture), there'll be antigenes on her side of the placenta. Is that right?
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Postby aptitude » Mon Oct 10, 2011 3:13 am

There are three layers in the back of the eye: the retina, the choroid (which absorbs extra light), and the sclera. Thus, e is the choroid, and f is the sclera.

Yes, your answer for the second question is correct.
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Postby Juggler » Mon Oct 10, 2011 12:02 pm

Thank you :)
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