multi-tissue structure
 |__foregut_______________________
ectodermal derivative             |
 |__anterior ectoderm derivative__|
gut                               |
 |__adult gut_____________________|
gut section                       |
 |__foregut_______________________|
adult alimentary canal            |
 |__adult gut_____________________|
                                  adult foregut  127 rec.
                                   |__adult esophagus 23 rec.
                                   |   |__adult esophageal muscle cell(+) 1 rec.
                                   |   |__adult esophagus epithelium(+) 6 rec.
                                   |__adult foregut epithelium 22 rec.
                                   |   |__adult esophagus epithelium(+) 6 rec.
                                   |   |__adult foregut epithelial cell(+) 22 rec.
                                   |   |__adult proventriculus epithelial zone 1(+)
                                   |   |__adult proventriculus epithelial zone 2(+)
                                   |   |__adult proventriculus epithelial zone 3(+)
                                   |   |__adult proventriculus inner layer
                                   |   |__crop epithelium(+) 16 rec.
                                   |__adult pharynx 40 rec.
                                   |   |__adult cibarium(+) 33 rec.
                                   |   |__adult epipharynx
                                   |   |__adult hypopharynx(+) 14 rec.
                                   |__chitinous intima of the adult foregut
                                   |   |__chitinous intima of the cardial valve
                                   |__crop 72 rec.
                                       |__adult crop circular muscle cell 5 rec.
                                       |__crop epithelium(+) 16 rec.