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NEXT ROOST NEXT PAGE UP CATEGORY PREVIOUS PAGE PREVIOUS ROOST Carl's Roost:
Day 9 Observations
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(Notes by Carl. Joanne is still cleaning up after the tornado).

The 9-day chick is moving around a lot. 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. Note the difference between frame frame 78 and 82 in this respect - the motion was different, and the fluid looks different.

In Frame 45 and 78, we clearly see the blood-filled membranes just inside the shell. These are used by the chick to breathe (the shell is porous), the same way we use our lungs. The membranes are bright because the blood is flowing. Other blood vessels are visible - only some of these are actually in the chick's body.

Frame 45 Frame 78

The albumen continues to differentiate into two layers, one above and one below the yolk. This is particularly evident on frames 82 and 87, where the different imaging techniques make the two layers appear differently.

The yolk continues to deform, becoming flatter and smaller.

Frames 82 and 87 (slighly corrupted image)


C.D.Gregory: April 24, 1996



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