Simon Fraser University3 年
Reptiles: scales and the amniotic egg
Other extra-embryonic folds expand up over the embryo to form the amniotic folds. The amnion and chorion develop together as upwardly projecting amniotic folds, eventually closing over the dorsal ...
Simon Fraser University3 年
Reptiles: scales and the amniotic egg
Other extra-embryonic folds expand up over the embryo to form the amniotic folds. The amnion and chorion develop together as upwardly projecting amniotic folds, eventually closing over the dorsal ...