Type | MGI:General | Description | at 8 weeks of age submandibular gland mass normalized to body weight is increased by about 25% compared to controls, no difference in mass is seen at 3 days of age at 3 days of age the acini have characteristics of exocrine cells but have few, small, electron-dense granules, large basally oriented nuclei, tight junctions, and accumulations of glycogen however, serous demilune cell morphology is normal |