Chyme

Definition

Chyme is the semi-fluid mass of partly digested food that is expelled by the stomach into the duodenum. It consists of gastric juices and partially digested food.

5 Must Know Facts For Your Next Test

1. Chyme formation occurs in the stomach through mechanical and chemical digestion processes.
2. The acidic nature of chyme helps to activate digestive enzymes in the small intestine.
3. Peristaltic movements aid in propelling chyme from the stomach into the small intestine.
4. Regulation of chyme release into the duodenum is controlled by the pyloric sphincter.
5. Nutrient absorption primarily occurs after chyme reaches the small intestine, particularly in the jejunum.

Review Questions

• What role does chyme play in digestion?
• How does the pyloric sphincter regulate chyme movement?
• Why is it important for chyme to be acidic?

Related terms

Gastric Juices: Digestive fluids produced by glands in the stomach lining, containing hydrochloric acid and enzymes.

Pyloric Sphincter:

A ring of smooth muscle between the stomach and duodenum that regulates passage of chyme.

Peristalsis:

Involuntary contractions that move food through the gastrointestinal tract.