the center part of the digestive tract in a vertebrate embryo from where the ileum, jejunum, and portions of this duodenum and colon develop. Also referred to as mesenteron.
The middle portion of the digestive tract of specific invertebrates, such as for example arthropods, lined with an enzyme-secreting tissue and offering as main website of food digestion and consumption.
The main cycle associated with the alimentary canal of an embryo involving the foregut and also the hindgut
The middle an element of the alimentary canal from the stomach, or entry of the bile duct, to, or including, the big bowel.