Embryonic Development Of The Chicken Day 1

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Duration: 1:10
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18 h -Primitive gut begins; primordial germ cells appear in germinal crescent.

20 h -Vertebral column begins.

21 h -Appearance of neural groove, nervous system.

22 h -Appearance of first pair of somites (block-like segments) and head.

23 to 24 h -Blood islands, vitelline (yolk sac) circulation, blood, heart,blood vessels begin (2 to 4 somites).







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