Anatomy Constrictions of esophagus when measured from upper incisors are present at? A 15 cm, 20 cm, 40 cm B 15 cm, 25 cm, 40 cm C 20 cm, 30 cm, 40 cm D 30 cm, 40 cm. 60 cm 💡 Explanation Constrictions of esophagus when measured from upper incisors are present at? ✓ Correct Answer: B. 15 cm, 25 cm, 40 cm