Question

Salient feature of chick embryo of 13 hrs,19hrs, 24hrs,33hrs and 48hrs of incubation?

Answer 1

13 hrs :

13 hours after incubation the primitive streak is. so distinct so embryo is characterised as being in primitive stage.

19 hrs :



At this stage dark peripheral area apaca and central translucent area Pellucida are distinctly visible.


24 hrs :

At this stage dark peripheral area apaca , central translucent and colourless area Pellucida is distinctly visible.

33 hrs :


At this stage the dark peripheral area opaca and central translucent area pellucida are not distinctly visible.

The primitive streak has been comparatively reduced because of great lengthening of neural canal and neural folds.

The extra embryonic area has grown in size.

48 hrs :

At this stage the dark peripheral area opaca and central translucent and colourless area pellucida are not visible.

The primitive streak is comparatively reduced because of great lengthening of neural canal and neural folds. The notochord has extended from behind the brain up to the end of body.
The brain is differentiated into fore brain, mid brain and hind brain.




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