肠胚胎的消化管，包括前肠，中肠和后肠。
The embryonic digestive tube consisting of the foregut the midgut and the hindgut.
这就为前肠和中肠的邻接部分提供了神经。
This innervate the adjacent region of the fore and middle intestine.
结论：p 53蛋白可在胃癌的早期诊断中起作用，其改变在胃癌发生的早期即居于肠化生阶段的癌前变化过程中。
Conclusion: P53 protein can be used in early clinical diagnosis. Early in gastric carcinogenesis, its change occurs at intestinal metaplasia stage.
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