mid.gut
n.（名词）The middle section of the digestive tract in a vertebrate embryo from which the ileum, jejunum, and portions of the duodenum and colon develop.Also called mesenteron 中肠：脊椎动物胚胎中消化道的中间部分，回肠、空肠、部分十二指肠和节肠均属此部位也作 mesenteronThe middle portion of the digestive tract of certain invertebrates, such as arthropods, lined with an enzyme-secreting tissue and serving as the main site of digestion and absorption.中央管：某些无脊椎动物，如节肢动物消化管的中央部分，上面布有分泌酶的组织，为消化和吸收的主要部位
