restriction. n. 1. something that restricts; a restrictive measure, law, etc. 2. the act of restricting or the state of being restricted. 3. (Logic) logic maths a condition that imposes a constraint on the possible values of a variable or on the domain of arguments of a function.
The primitive gut that forms during gastrulation in the developing embryo is known as the archenteron or the digestive tube.It develops into the digestive tract of an animal.ach is controlled by the dorsal blastopore, and primitive node (also known as Hensen's node), respectively. During Gastrulation, the Archenteron develops into the digestive tube, with the blastopore developing into either the mouth (Protostome) or the anus (Deuterostome).
The developing gut tube is attached to the anterior and posterior walls of the abdominal cavity by a double layer of peritoneum called mesentery. This double layer encloses the gut tube and hence the organs developing from it.Anterior to the developing gut tube is the ventral mesentery.Posterior to it is the dorsal mesentery. The dorsal mesentery extends like a curtain from the diaphragm to the base of the abdominal cavity, hence posterior to the gut tube there is no communication between the left and right halves of the abdominal cavity.he developing gut tube is attached to the anterior and posterior walls of the abdominal cavity by a double layer of peritoneum called mesentery. This double layer encloses the gut tube and hence the organs developing from it.