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The Word Becomes Flesh - Boards Of Canada
Composed by：Boards of Canada
Produced by：Boards of Canada
The head of the embryo grows forward and the gut elongates rearward
The neural folds meet in the brain region but do fuse
At this stage four pairs of somites blocks of mesodermal tissue have formed
Remarkable development of the embryo in more detail
As the head of the embryo grows forward
The head fold further undercuts it's anterior end
If we open a fertilized egg that has just been laid we see the yolk
The neural folds fuse to form new sets
Anterior end develops into a three-part brain
These rope-like strands called the chalazae help to hold the yolk in position
Early structures of the eye are now prominent
Meanwhile
The egg passes down the oviduct
The embryo develops in an equally exciting manner
In this later stage a small embryo is already visible
These rope-like strands called the chalazae
As a light-colored disk
Called the blastoderm the blastoderm the central part of
Soon blood vessels appear outside the embryo
The heart develops and begins to beat
By repeated cell divisions while the egg called the chalazae
The pattern of blood vessels over the egg expands
Supplying the embryo with food and oxygen and removing waste
Cell division continues and is restricted to the blastoderm
As the embryo grows brain eyes and other structures develop
The extensive yolk of the egg does not divide
Soon a vigorously beating heart is pumping blood throughout the complex embryo
Which is rapidly developing into a mature organism
The cells move from both sides of the midline
A long thickened area called the primitive streak
Part of the blastoderm the area pellucida is translucent because it is over a liquid
And the white of the egg
Vessels over the yolk expands
Some of the albumen becomes thickened and twisted as the egg passes down the oviduct
The central part of
These rope-like strands called the chalazae help to hold the cells in position
The blastoderm at this stage consists of many cells produced by repeated cell divisions
While the egg was still within the organism
The blastoderm the area pellucida
The central part of will completely surround the filled cavity
Eyes the midline stage develop
The head of the embryo grows forward and the gut elongates
Visible the neural folds meet
The outer portion the area opaca is opaque
The cells move from both sides of the midline
A long thickened area called the primitive streak
