Archive image from page 156 of The development of the chick. The development of the chick : an introduction to embryology . developmentofchi02lill Year: 1936 Vojn Fig. 74. â Head of the same embryo from the ventral side. Abbreviations as before. 'Vi.',''''' '''''''' ''='°' °f â¢>« ''''l of embryo of 18 s the isthmus'V?o1''preo1al'iuro'rnl o'/7'. ''- «<â «-' 'f opticus. S.'âu!'veno:us! 'therafbreSiot as bfrre.''' ' immediately turns backwards over the head, forming a complete cap ( 67, 71, 75, etc.); the side limbs of the head-fold'ale hen elongated backwards,
Archive image from page 156 of The development of the chick. The development of the chick : an introduction to embryology . developmentofchi02lill Year: 1936 Vojn Fig. 74. â Head of the same embryo from the ventral side. Abbreviations as before. 'Vi.',''''' '''''''' ''='°' °f â¢>« ''''l of embryo of 18 s the isthmus'V?o1''preo1al'iuro'rnl o'/7'. ''- «<â «-' 'f opticus. S.'âu!'veno:us! 'therafbreSiot as bfrre.''' ' immediately turns backwards over the head, forming a complete cap ( 67, 71, 75, etc.); the side limbs of the head-fold'ale hen elongated backwards, and are here known as the lateral folds of the amnion; these rise up and arch over the embryo
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