| FERTILIZATION |
The nervous system begins to develop |
THE EGG IS LAID |
The brain starts to form. |
The heart begins to beat. |
hours A blood supply grows out of the embryo to cover the yolk so that the embryo can feed and breathe. |
The wings and legs start to develop. |
The embryo is complete but only 2 cm long. |
The chick breaks into the air space at the end of the egg.it starts to breathes. The chick calls to its mother from inside the egg. |
The chick uses its egg tooth to make a hole in the shell. The chick will now be cared for and protected by its parents until it is old enough to care for itself. |