Formation of Mouth and Anus
The defining characteristic of the deuterostome is the fact that the blastopore (the opening at the bottom of the forming gastrula) becomes the anus, whereas in protosomes the blastopore becomes the mouth. The deuterostome mouth develops at the opposite end of the embryo from the blastopore and a digestive tract develops in the middle connecting the two.
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—Elizabeth Stuart Phelps (18441911)
“Out of my discomforts, which were small enough, grew one thing for which I have all my life been gratefulthe formation of fixed habits of work.”
—Elizabeth Stuart Phelps (18441911)
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—Bible: Hebrew Deuteronomy, 8:3.
Jesus recalls these words in Matthew 4:4.