A muscular organ that breaks down food using acids and enzymes?

A muscular organ that breaks down food using acids and enzymes?

• A. Stomach
• B. Esophagus
• C. Liver
• D. Pancreas

Answer: (A)

Digestion involves both mechanical mixing and chemical breakdown. The stomach is the muscular chamber where food is churned by the walls while gastric juice is secreted. This juice contains acid (hydrochloric acid) to create a acidic environment and enzymes such as pepsin that start protein digestion. The combination of strong muscular contractions and these digestive secretions is exactly what breaks down food in this organ, forming a semi-liquid substance called chyme. The esophagus mainly moves food toward the stomach through peristaltic waves and doesn’t perform significant chemical digestion. The liver produces bile to help digest fats but doesn’t itself break down food. The pancreas releases digestive enzymes into the small intestine, where most digestion occurs, rather than acting as the muscular site that begins the breakdown in the stomach.

Digestion involves both mechanical mixing and chemical breakdown. The stomach is the muscular chamber where food is churned by the walls while gastric juice is secreted. This juice contains acid (hydrochloric acid) to create a acidic environment and enzymes such as pepsin that start protein digestion. The combination of strong muscular contractions and these digestive secretions is exactly what breaks down food in this organ, forming a semi-liquid substance called chyme.

The esophagus mainly moves food toward the stomach through peristaltic waves and doesn’t perform significant chemical digestion. The liver produces bile to help digest fats but doesn’t itself break down food. The pancreas releases digestive enzymes into the small intestine, where most digestion occurs, rather than acting as the muscular site that begins the breakdown in the stomach.