The three compartments are thought to be of common endodermal origin ; in contrast to earlier hypotheses , which suggested that the endocrine compartment was of neuroectodermal origin .
the three compartments are thought to be of common endodermal origin ; in contrast to earlier hypotheses , which suggested that the endocrine compartment was of neuroectodermal origin .
O O O O O O O O O B-other_name I-other_name O O O O O O O O O O O O O O O B-other_name I-other_name O