Into which segment of the small intestine does chyme pass after leaving the stomach?

Into which segment of the small intestine does chyme pass after leaving the stomach?

• A. Duodenum
• B. Jejunum
• C. Ileum
• D. Cecum

Answer: (A)

Chyme enters the small intestine through the duodenum, the first section just after the stomach. This is where the chyme mixes with bile and pancreatic juices, beginning the digestion of fats, proteins, and carbohydrates. After the duodenum, chyme moves into the jejunum and then the ileum, where most nutrient absorption occurs. The cecum is part of the large intestine, not the small intestine, so it isn’t where chyme first enters after the stomach. So, the segment chyme passes into immediately after leaving the stomach is the duodenum.

Chyme enters the small intestine through the duodenum, the first section just after the stomach. This is where the chyme mixes with bile and pancreatic juices, beginning the digestion of fats, proteins, and carbohydrates. After the duodenum, chyme moves into the jejunum and then the ileum, where most nutrient absorption occurs. The cecum is part of the large intestine, not the small intestine, so it isn’t where chyme first enters after the stomach. So, the segment chyme passes into immediately after leaving the stomach is the duodenum.