Anatomy While putting nasogastric tube, the length is measured from upper incisors. What is the distance from upper incisors to cardia of the stomach? A 15 cm B 25 cm C 40 cm D 60 cm 💡 Explanation While putting nasogastric tube, the length is measured from upper incisors. What is the distance from upper incisors to cardia of the stomach? ✓ Correct Answer: C. 40 cm