Key Points Development of the lung as a derivative of the upper gastrointestinal tract. Predisposition of anatomy of the lungs to aspiration of food, saliva, and vomitus. Development of four-chambered ...

Mesentery is a sheet-like structure that encloses the intestine and attaches it to the posterior part of the abdominal wall. First illustrations of the structure in situ indicated its contiguity, and ...