Chyme

Definition

Chyme is the semi-liquid mixture of partially digested food and digestive juices formed in the stomach. It moves into the small intestine for further digestion and nutrient absorption.

5 Must Know Facts For Your Next Test

1. Chyme is created in the stomach after food is mixed with gastric juices, including hydrochloric acid and digestive enzymes.
2. The pyloric sphincter regulates the passage of chyme from the stomach into the duodenum, the first part of the small intestine.
3. Chyme's acidic nature is neutralized by bicarbonate ions secreted by the pancreas when it enters the small intestine.
4. The consistency of chyme allows for maximum exposure to digestive enzymes and absorption surfaces in the intestines.
5. Hormones like gastrin and secretin play roles in controlling chyme production and movement through the digestive tract.

Review Questions

• What role does chyme play in digestion?
• How does chyme move from the stomach to the small intestine?
• Which hormones are involved in regulating chyme production and movement?

Related terms

Pyloric Sphincter: A muscular valve that regulates the flow of chyme from the stomach to the duodenum.

Gastrin: A hormone that stimulates gastric juice secretion to aid in forming chyme.

Duodenum: The first section of the small intestine where chyme undergoes further digestion and nutrient absorption.