It is thus possible that the neurenteric canal is due to the conjunction of a posterior neuropore with the blastopore, i.e.
(Adapted from Hatschek.) pc, Praechordal head-cavity of embryo; cc, collar-cavity (first somite); my, mesodermic somites (myocoelomic or archenteric pouches); ch, notochord with the neural tube (neurochord) lying upon it; np, anterior neuropore; ne, position of posterior neurenteric canal.
How would you define neuropore? Add your definition here.