Which of the following organs is NOT involved in chemical digestion?Large intestine.Mouth.Stomach.Small intestine.

1. Break Down the Problem

We need to identify which organ among the following options is not involved in the process of chemical digestion:

• Large intestine
• Mouth
• Stomach
• Small intestine

2. Relevant Concepts

Chemical digestion involves the breakdown of food substances into simpler chemical compounds with the help of enzymes. Various organs contribute to this process:

• Mouth: Begins the process of digestion with saliva, which contains enzymes like amylase that break down carbohydrates.
• Stomach: Produces gastric juices and enzymes, such as pepsin, to chemically break down proteins.
• Small intestine: Is the primary site for chemical digestion and absorption, aided by enzymes from the pancreas and bile from the liver.
• Large intestine: Primarily involved in water absorption and the formation of waste, rather than the chemical breakdown of food.

3. Analysis and Detail

Given the roles of each organ, the large intestine stands out as it does not contribute to the chemical digestion of food. Instead, its main functions are to absorb water and salts and to process waste.

4. Verify and Summarize

After reviewing the functions of each organ, it is clear that while the mouth, stomach, and small intestine all play critical roles in chemical digestion, the large intestine does not.

Final Answer

The organ that is NOT involved in chemical digestion is the Large intestine.