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Read each item carefully. Circle the letter of the correct answer.

1. Which of the following is NOT a main part of the digestive system?

a. mouth
b. esophagus
c. stomach
d. liver

Answer :

Final answer:

The liver is not a main part of the digestive tract despite its important role in digestion. The mouth, esophagus, and stomach are the primary components of the digestive system. Hence, the answer to the question is d. liver.


Explanation:

Understanding the Digestive System


The question asks about the components of the digestive system and specifically which of the listed options is NOT a main part. Here are the options given:



  1. a. mouth

  2. b. esophagus

  3. c. stomach

  4. d. liver


In the context of human digesive system, the mouth, esophagus, and stomach are crucial parts in the process of digestion. The mouth is where mechanical digestion begins, the esophagus transports food to the stomach, and the stomach further digests food, both mechanically and chemically. However, the liver, while vital for digestion (as it produces bile), is not directly involved in the digestive tract itself; instead, it plays a supportive role by processing nutrients absorbed in the small intestine.


Therefore, the correct answer to the question is d. liver.


Learn more about Digestive System here:

https://brainly.com/question/40473254


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