Biology Reference
In-Depth Information
Figure 12.
Photomicrographs of the gastric wall of spontaneously metamorphosing
Japanese fl ounder at three different developmental stages. (a) Premetamorphosis. (b) early
prometamorphosis. Note primordial crypts (arrowheads). (c) post-climax. L, gastric lumen;
G, gastric glands. (a-c) Same magnifi cation. [From Miwa et al., 1992, with permission].
crypts. The cells at the bottom of the crypt proliferate and form simple
alveolar or acinar structures (Fig. 12-b). At metamorphic climax, the
glandular cells rapidly proliferate, resulting in developed gastric glands
at post climax stage (Fig. 12-c). The gastric wall of premetamorphic larvae
shows no immunohistochemical reaction with antiserum to pepsinogen,
