What are the three parts of the small intestine?

What are the three parts of the small intestine?

• A. Duodenum, jejunum, ileum
• B. Cecum, colon, rectum
• C. Pylorus, body, fundus
• D. Esophagus, stomach, jejunum

Answer: (A)

The correct choice identifies the three distinct segments of the small intestine: the duodenum, jejunum, and ileum. Each of these parts has specific functions and anatomical features crucial for digestion and absorption.

The duodenum is the first section of the small intestine, receiving chyme from the stomach along with digestive enzymes and bile, which play a critical role in further breaking down food. The jejunum is the middle section, where most of the nutrient absorption occurs, characterized by its numerous folds and villi that increase surface area. Finally, the ileum is the final segment, which absorbs remaining nutrients and bile salts before they are sent back to the liver.

Understanding the structure and function of each of these parts is vital in radiography, particularly in imaging studies that assess the gastrointestinal tract. The other options relate to different sections of the digestive system or other organs, thus not aligning with the direct question about the small intestine.