Question:
Rotation, herniation, coiling, and placement are observed in the development of
Rotation, herniation, coiling, and placement are observed in the development of
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Physiological herniation and subsequent rotation around the cranial mesenteric artery are highly unique developmental features of the intestine.
Updated On: Aug 24, 2026
- Intestine
- Stomach
- Pharynx
- Liver
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
The development of the digestive tract involves complex morphogenetic movements of the primitive gut tube to fit within the embryonic abdominal cavity.
Step 2: Detailed Explanation:
The development of the primitive intestine (midgut loop) is characterized by several distinct stages:
1. Herniation: Due to rapid elongation of the midgut loop and the large size of the developing liver and kidneys, the abdominal cavity becomes temporarily too small, causing the loop to herniate physiologically into the umbilical cord.
2. Rotation: While in the umbilical cord, the loop rotates 270 degrees counterclockwise around the axis of the cranial mesenteric artery.
3. Coiling: The small intestinal segment of the loop elongates rapidly, forming multiple coils.
4. Placement (Retraction): The herniated loop returns to the abdominal cavity and settles into its permanent anatomical position.
Therefore, these stages are characteristic of intestinal development.
Step 3: Final Answer
The correct option is (A).
The development of the digestive tract involves complex morphogenetic movements of the primitive gut tube to fit within the embryonic abdominal cavity.
Step 2: Detailed Explanation:
The development of the primitive intestine (midgut loop) is characterized by several distinct stages:
1. Herniation: Due to rapid elongation of the midgut loop and the large size of the developing liver and kidneys, the abdominal cavity becomes temporarily too small, causing the loop to herniate physiologically into the umbilical cord.
2. Rotation: While in the umbilical cord, the loop rotates 270 degrees counterclockwise around the axis of the cranial mesenteric artery.
3. Coiling: The small intestinal segment of the loop elongates rapidly, forming multiple coils.
4. Placement (Retraction): The herniated loop returns to the abdominal cavity and settles into its permanent anatomical position.
Therefore, these stages are characteristic of intestinal development.
Step 3: Final Answer
The correct option is (A).
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