사람의 위벽 발생에 관한 연구 = A Study on the Development of Human Gastric Wall

다국어 초록 (Multilingual Abstract)

The gastric walls of human embryos and fetuses aging from 5 to 40 weeks were studied to observe the development of the gastric mucosa and gastric glands, and the time of appearance of the extrnal muscle layer and muscularis mucosae.
The results were as follows:
1. Primitive gastric mucosa shows active mitotic figures in the embryos of 5 weeks of age, and gastric pits are identified in the embryos of 8 weeks of age. On the ninth week, the gastic epithelium is the tall simple columnar, similar to adult type.
2. Gastric glands are formed by the invagination of the gastric epithelium, and on the eighteenth week, gastric glands with numerous parietal cells are found in lamina propria.
3. The inner circular muscle layer appears on the seventh week, and that of the outer longitudinal muscle layer on the ninth week. The muscularis mucosae is noticed later than the appearance of the outer longitudinal layer.