Final answer:
The ventral border of the developing stomach moves upwards and towards the right, while the dorsal border moves downwards and towards the left. These movements facilitate the rotation and proper orientation of the stomach in the abdominal cavity.
Step-by-step explanation:
After the stomach has developed, the movement of the stomach's borders during embryonic development is a complex process involving the rotation and positioning of the gastrointestinal tract. The ventral border of the stomach, which is where the lesser curvature is found, moves upwards, and as the stomach rotates, this ventral surface moves towards the right side of the body. Meanwhile, the dorsal border, which is home to the greater curvature, moves downwards and stretches out, with its surface moving towards the left. This development ensures the proper formation of the stomach and its orientation within the abdominal cavity.
The stomach's ventral and dorsal borders support its ability to churn food effectively. The stomach itself, with its various regions such as the cardia, fundus, body, and pylorus, is essential for digestion. These regions are facilitated by layers of muscle, including an inner oblique layer unique to the stomach which assists in the dynamic movement and processing of ingested materials.