archenteron A primitive digestive cavity of the embryo at the gastrula stage of development in animals. It is formed by invagination of mesoderm and endoderm cells, opens to the outside by a
What forms the archenteron in sea urchins?
Following ingression of PMCs, there is a pause, and then the vegetal plate invaginates to form a stout cylinder called the archenteron. After another pause, secondary mesenchyme cells appear at the tip of the archenteron, and at about this time the archenteron begins to elongate across the blastocoel.
Does the archenteron become?
The archenteron eventually becomes the cavity of the digestive tract, and the blastopore becomes the anus; the mouth arises as a new opening. …the primitive gut cavity, or archenteron, which eventually gives rise to the hollow core (lumen) of the alimentary canal.
