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Discussion in 'Incubating & Hatching Eggs' started by pax12, Jan 31, 2012.
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6 to 10 h - First kidney-like cells (pronephros) begin to form.
8 h -Appearance of primitive streak.
10 h -Yolk sac (embryonic membrane) begins. Functions include: a) blood formation; b) yolk digestion; c) yolk absorption; d) food provision after hatching. Mesoderm appears; embryo oriented at 90° angle to egg's long axis; mesonephros begins.
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).
Hows it going to get calcium this time?
I've watched all your previous experiments. Fingers crossed for you.
The calcium this time is better, but the duck egg in the cup started to rot,so I took it out.
The rubber egg is doing great, I checked it and it started growing
and everything else is still going great.
25 h -Appearance of eye; vertebral column visible; embryo begins to turn on left side (6 somites).
28 h -Ear begins (7 somites).
30 h -Amnion (embryonic membrane around embryo) begins. Primary function is to protect embryo against shock and sticking; also responsible for some albumen absorption. Chorion (embryonic membrane that fuses with allantois) begins; heartbeat begins (10 somites).
38 h -Cranial flexure and torsion evident; heartbeat moves blood (16 to 17 somites).
42 h -Thyroid begins.
48 h -Anterior pituitary and pineal glands begin to develop.
50 h -Embryo turns on left side; allantois (embryonic membrane that fuses with chorion) begins. Functions of chorioallantois are: a) respiration; b) albumen absorption; c) absorption of calcium from shell; d) storage of kidney excretions.
60 h -Nasal pits, pharynx, lungs, anterior limb buds begin.
Some bad news, The chicken and duck eggs in the cup didnt make it, but on the good side the rubber egg and the two in the bag are going strong.
I have added something new, Im working on cutting part of the shell off the side to watch it grow with the 98% shell still there. Video coming soon.