a human embryo ( carnegie stage 21 ) with tracheoesophageal malformations ( esophageal atresia and tracheoesophageal fistula ) and anomalies at the caudal end of the embryo ( anorectal atresia , rectovesical fistula , vertebral and notochordal defects , and agenesis of the metanephros ) was studied .
C0868971
human embryo
C0028439
notochordal