biology notes

The Great Divide

Cephalic furrow the early fold
Divides the embryo in one go.
Pulling in on its own
Deep it sinks into the yolk.

This great divide of tissue fold
Splits the embryo in back and front.
But why the furrow once it grows
Stretches flat and gone it goes?

A fold that folds and then unfolds
Leave us wondering what’s the role.

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