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Day 11: Birds of a (Colored???) Feather An MRI's View 
The 11-day chick is moving even more. We cannot get very clear pictures, because it won't hold still long enough! We can see the "motion artifacts" in some images. We also see that if we repeat the same slice over and over, it looks different each time. Finally, we see lots of bright spots, especially in the amnion, caused by "sloshing" of the fluid as the chick moves.
The upper albumen layer has shrunk considerably. The allantois with its shell membranes and blood vessels can be seen in many places. The chick's aorta (main blood vessel) is also visible in many frames. Comments on these images were
supplied by Carl Gregory. Thanks Carl!
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We got lucky and found the chick holding
still a few times. We can see that he has
grown a lot! Frame 143 is the best. You
can even see two parts of the brain
(forebrain and hindbrain). The body is
smaller, and not as easy to see as the
head with its huge eyes.
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