مراحل تطور جنين الدجاج شرح + الصور Chick Embryo Development

مراحل تطور جنين الدجاج شرح + الصور Chick Embryo Development

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Chick Embryo Development


Infertile
• No development.

Day 1
• Appearance of
tissue development.

Day 2
• Tissue development
very visible.
• Appearance of blood
vessels.

Day 3
• Heart beats.
• Blood vessels
very visible.

Day 4
• Eye pigmented

Day 5
• Appearance of
elbows and knees.

Day 6
• Appearance of beak.
• Voluntary movements
begin.

Day 7
• Comb growth begins.
• Egg tooth begins to
appear.

Day 8
• Feather tracts seen.
• Upper and lower beak
equal in length.

Day 9
• Embryo starts to look
bird-like.
• Mouth opening appears.

Day 10
• Egg tooth prom
• Toe nails

Day 11
• Comb serrated.
• Tail feathers apparent.

Day 12
• Toes fully formed.
• First few visible
feathers

Day 13
• Appearance of scales.
• Body covered lightly
with feathers.

Day 14
• Embryo turns
head towards
large end of egg.

Day 15
• Gut is drawn into
abdominal cavity

Day 16
• Feathers cover
complete body.
• Albumen nearly gone.

Day 17
• Amniotic fluid
decreases.
• Head is between

Day 18
• Growth of embryo
nearly complete.
• Yolk sac is still on
outside of embryo.
• Head is under the
right wing

Day 19
• Yolk sac draws into
body cavity.
• Amniotic fluid gone.
• Embryo occupies
most of space within
egg (not in the air cell).

Day 20
• Yolk sac drawn
completely into body.
• Embryo becomes
a chick (breathing
in air cell).
• Internal and external pip.

Day 21

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