on the 17th day, the chick has well positioned itself. air cell turns to be larger. beak is under the wing, and pointing to the air cell. lung vessels have been formed, but there is still no circulation inside, and pulmonary respiration is yet to commence. amniotic fluid and allantoic fluid are decreasing. body, legs, and wings become larger, thus the scale ofhead and eyes turns to be smaller. head is between two legs.
the small end of egg is no more transparent in can dling.
on the 17th day, the chick has well positioned itself. air cell turns to be larger. beak is under the wing, and pointing to the air cell. lung vessels have been formed, but there is still no circulation inside, and pulmonary respiration is yet to commence. amniotic fluid and allantoic fluid are decreasing. body, legs, and wings become larger, thus the scale ofhead and eyes turns to be smaller. head is between two legs. the small end of egg is no more transparent in can dling.
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