where does the duodenum end and the jejunum start
Duodenum The fourth part, or ascending part, of the duodenum passes upward, joining with the jejunum at the duodenojejunal flexure. The fourth part of the duodenum is at the vertebral level L3, and may pass directly on top of, or slightly left to, the aorta.[8]:274
Swallowing 5) Closure of the nasopharynx
Stomach In classical anatomy, the human stomach is divided into four sections, beginning at the gastric cardia,[6] each of which has different cells and functions.
Alonso Álvarez de Pineda