Atlas of Drosophila Development by Volker Hartenstein | Table of Contents |
Intestinal Tract pages 28-29 | 30-31 | 32-33 | 34 | 35 | |
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At stage 11, the parts of the foregut primordium giving
rise to the proventriculus (pv) and the adjacent esophagus (es) have invaginated. They form the stomodeum. The primordia of the salivary
glands (sg) invaginate from the ventral labial segment. The posterior
midgut rudiment (pmg), after its cells performed the third
postblastoderm division, has lost its epithelial characteristics and now
forms a solid cluster of rounded cells equal to those of the anterior midgut
rudiment (amg), Four spherical evaginations, which will form the
Malpighian tubules (mp), appear in the hindgut primordium
close to its boundary to the posterior midgut rudiment (see Skaer, this
volume).
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