Development on the esophagus of fetuses and neonates in Korean native goats

Jung, Soon-hee; Kim, Chong-sup; Huh, Chan-kwen

Korean Journal of Veterinary Research 1994;34(4):679-686.

Soon-hee Jung, Chong-sup Kim, Chan-kwen Huh

College of Veterinary Medicine Gyeongsang National University

한국재래산양의 태아 및 신생아의 식도 발달에 관하여

정순희, 김종섭, 허찬권

경상대학교 수의과대학

Abstract

The development of esophagus in fetuses between 60, 90, 120 days of gestation and neonates of Korean native goats was investigated by light, scanning electron microscopy. The results were summarized as follows; 1. The esophageal wall appeared to be differentiated into the epithelium, lamina propria, tunica muscularis and tunica adventitia at 60 days of gestation. The esophageal epithelium was stratified cuboidal at 60 days, being transformed into stratified squamous epithelium at 90 days, and completely transformed into squamous epithelium an 120 days. 2. In scanning electron microscopy, the longitudinal furrows and ridges appeared on the epithelium of the esophagus of the fetuses at 60 days of gestation. The longitudinal furrow became deeper and microplicae appeared in 90-day-old fetuses. The transverse and longitudinal folds appeared on the epithelial surface of esophagus and the esophageal epithelium started to be keratinized in the neonates.

Key Words: Korean native goat, esophagus, development