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 digestive system. The digestive system is one of the body's major organ systems. All animals-with the exception of some endoparasites such as tapeworms-have a digestive system. In this section we're going to look at digestion in ruminants, and compare their guts with those of other, non-ruminant, mammals.igestive tract anatomy of hindgut fermenters. The stomach and small intestine of hindgut fermenters are similar in form and function to other non-ruminant herbivores. Food passes down the oesophagus and into the stomach (which does much the same job as the ruminant abomasums).