Which is a main organ of the digestive system?

Which is a main organ of the digestive system?

• A. Liver
• B. Esophagus
• C. Rectum
• D. Mouth

Answer: (D)

Digestion begins in the mouth, a primary part of the digestive tract. Here, food is physically broken down by teeth and mixed with saliva, which starts chemical digestion with enzymes like amylase. This initial processing is essential for preparing nutrients to be absorbed later along the system. In contrast, the esophagus mainly acts as a conduit to move food toward the stomach, the liver serves as an accessory organ that makes bile for fat digestion, and the rectum is involved in waste elimination. Because the mouth is where digestion actually starts and the food processing begins, it is considered a main organ of the digestive system.

Digestion begins in the mouth, a primary part of the digestive tract. Here, food is physically broken down by teeth and mixed with saliva, which starts chemical digestion with enzymes like amylase. This initial processing is essential for preparing nutrients to be absorbed later along the system. In contrast, the esophagus mainly acts as a conduit to move food toward the stomach, the liver serves as an accessory organ that makes bile for fat digestion, and the rectum is involved in waste elimination. Because the mouth is where digestion actually starts and the food processing begins, it is considered a main organ of the digestive system.